Perhaps you should try some spelling variations:
plant lice » plant life
cost plant » host plant, host plants, cost land
yan yang » yang yang, dan yang, tan yang
yao yang » yang yang
hong hai » shang hai, zhong tai, dang hai
wong yue » wang yue, hong yu
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ((yan yang) OR (yao yang)) oil cost plant lice ((hong hai) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan yang) OR (yao yang)) oil cost plant lice ((hong hai) OR (wong yue)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yang) OR (yao yang)) oil cost plant lice ((hong hai) or (wong yue)) ;".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yang) OR (yao yang)) oil cost plant lice ((hong hai) or (wong yue)) ;*.