Terms: Solving Very Difficult Problems (516), solving difficult problems (106,000), very difficult problems (128,000), difficult problems (3,760,000), solving problems (14,700,000), solving difficult (320,000), very difficult (121,000,000),
Terms: problems (2,530,000,000),
Terms: overcome problems (1,360,000), handle problems (770,000), rid of problems (49,900),
Terms: health problems (76,600,000), foot problems (2,810,000), digestive problems (3,660,000), thyroid problems (2,460,000), shoulder problems (1,140,000), dental problems (2,630,000), stomach problems (2,870,000), behavioral problems (6,890,000),
Terms: social problems (16,900,000), international problems (988,000), systemic problems (1,530,000), eye problems (5,170,000), skin problems (14,900,000), hair problems (869,000), environmental problems (14,900,000), transportation problems (1,510,000),
Terms: hard problems (1,250,000), easy problems (245,000), simple problems (1,110,000), complex problems (7,780,000),
Terms: the problems (215,000,000), handle problems (770,000), math problems (4,620,000), marital problems (2,150,000), questions problems (12,200,000), story problems (578,000), overcome problems (1,360,000), logic problems (1,350,000), car problems (2,080,000), life problems (4,130,000), word problems (3,420,000), communication problems (3,390,000), computer problems (8,870,000), net problems (170,000), alcohol problems (3,280,000),
Terms: solving (223,000,000), very (6,010,000,000), difficult (1,110,000,000),
Boolean: problems +internet (545,000,000), problems -internet (1,980,000,000), problems +expert (202,000,000), problems -expert (2,320,000,000), problems +trouble (213,000,000), problems -trouble (2,310,000,000), problems +resources (559,000,000), problems -resources (1,950,000,000),
Boolean: problems +solutions (339,000,000), problems -solutions (2,180,000,000), problems +difficult (339,000,000), problems -difficult (2,180,000,000), problems +hard (540,000,000), problems -hard (1,990,000,000), problems +medical (378,000,000), problems -medical (2,140,000,000),
Boolean: problems +why (756,000,000), problems -why (1,760,000,000), problems +where (1,040,000,000), problems -where (1,480,000,000),
2525, 2522, 2523, 2509, 2519, 2519, 2530, 2516, 2520
A = AB + AB' = A(B+B') = A*I = A
Boolean: problems +the (2,480,000,000), problems -the (2,530,000,000), problems +when (1,410,000,000), problems -when (2,530,000,000), problems +if (1,660,000,000), problems -if (2,520,000,000), problems +how (1,420,000,000), problems -how (2,520,000,000),
5010, 3940, 4180, 3940 - a problem with these queries? Suppressing common words? Wild cards? spelling variations? Another algorithm?
Terms: problems difficult very solving (0), problems difficult solving (0), problems difficult very (1), problems difficult (102,000), problems solving (554,000), difficult solving (3,180), difficult very (364,000),
Boolean: +solving +very +difficult +problems (24,300,000), +solving +very +difficult -problems (6,480,000), +solving +very -difficult +problems (33,600,000), +solving +very -difficult -problems (25,300,000), +solving -very +difficult +problems (5,660,000), +solving -very +difficult -problems (3,900,000), +solving -very -difficult +problems (47,700,000), +solving -very -difficult -problems (74,200,000), -solving +very +difficult +problems (231,000,000), -solving +very +difficult -problems (418,000,000), -solving +very -difficult +problems (685,000,000), -solving +very -difficult -problems (4,590,000,000), -solving -very +difficult +problems (77,900,000), -solving -very +difficult -problems (375,000,000), -solving -very -difficult +problems (1,420,000,000), -solving -very -difficult -problems (0),
Boolean: internet +very (1,180,000,000), internet -very (3,360,000,000), internet +difficult (259,000,000), internet -difficult (4,210,000,000), internet +remote (241,000,000), internet -remote (4,240,000,000), internet +green (571,000,000), internet -green (3,930,000,000),
4540, 4469, 4481, 4501
Boolean: +internet +solving +very +difficult +problems (9,120,000), +internet +solving +very +difficult -problems (1,940,000), +internet +solving +very -difficult +problems (10,400,000), +internet +solving +very -difficult -problems (6,340,000), +internet +solving -very +difficult +problems (1,490,000), +internet +solving -very +difficult -problems (937,000), +internet +solving -very -difficult +problems (10,300,000), +internet +solving -very -difficult -problems (12,800,000), +internet -solving +very +difficult +problems (73,100,000), +internet -solving +very +difficult -problems (89,800,000), +internet -solving +very -difficult +problems (180,000,000), +internet -solving +very -difficult -problems (808,000,000), +internet -solving -very +difficult +problems (17,300,000), +internet -solving -very +difficult -problems (64,400,000), +internet -solving -very -difficult +problems (244,000,000), +internet -solving -very -difficult -problems (3,000,000,000),
Terms: stating problems (20,100), organizing problems (18,100), studying problems (91,900),
Terms: problem solving (94,800,000), finding answers (1,800,000), finding solutions (5,090,000), remembering answers (863), remembering solutions (365), tracking problems (386,000),