Perhaps you should try some spelling variations:
dong yang » dong hoang, wang yang, dan yang
yang yang » wang yang, wang yan
waste yan » waste can, waste land, waste bank
dong cao » dong xiao, dan cao, dong nan
jiu cong » li cong
ya from » yoga from, dna from, era from
yan jiu » yang jie, yang jin, pang jiu
a from » 1 from, dna from

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((dong cao) or (((dong yang) or (yang yang)))) ((ya from) OR (a from)) waste yan jiu cong shu ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((dong cao) OR (((dong yang) OR (yang yang)))) ((ya from) OR (a from)) waste yan jiu cong shu ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((dong cao) or (((dong yang) or (yang yang)))) ((ya from) OR (a from)) waste yan jiu cong shu ;*".