Perhaps you should try some spelling variations:
shang hai » shang kai, dang hai, chang ha
yan yang » yang yang, dan yang, tan yang
yao yang » yang yang
oil coal » oil cost, oil oil, oil can
plant li » plant life, plant lice, plant oil
hong hai » zhong tai, dang hai, hong tan
hong yu » wong yue
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 coal plant li ((((hong hai) OR (shang hai))) or (hong yu)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ((yan yang) OR (yao yang)) oil coal plant li ((((hong hai) OR (shang hai))) OR (hong yu)) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang ((yan yang) or (yao yang)) oil coal plant li ((((hong hai) OR (shang hai))) or (hong yu)) ;".
• Adding a wildcard symbol may retrieve word variants: wang ((yan yang) or (yao yang)) oil coal plant li ((((hong hai) OR (shang hai))) or (hong yu)) ;*.