Perhaps you should try some spelling variations:
cost book » lost book, coast books, best book
test book » best book, text book, lost book
yan yang » yang yang, yao yang, dan yang
sheng wu » sheng huo, sheng jou, shiung wu
shen guo » shen zuo, sheng huo, he guo
yang 3 » yang _, yang 8, gang 3
wang » wan, lang

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (wang OR wing) yan yang 3 ((test book) OR (cost book)) chain ((sheng wu) OR (shen guo)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(wang or wing) yan yang 3 ((test book) OR (cost book)) chain ((sheng wu) or (shen guo)) ;~".
• Adding a wildcard symbol may retrieve word variants: (wang or wing) yan yang 3 ((test book) OR (cost book)) chain ((sheng wu) or (shen guo)) ;*.