Perhaps you should try some spelling variations:
cost plant » host plant, host plants, cost land
plant lice » plant life
shang hai » shang kai, dang hai, chang ha
yan yang » yang yang, yao yang, dan yang
yang oil » yang zili, yang di, yang xi
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 oil cost plant lice ((shang hai) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan yang oil cost plant lice ((shang hai) OR (wong yue)) ;.
• Adding a wildcard symbol may retrieve word variants: wang yan yang oil cost plant lice ((shang hai) or (wong yue)) ;*.