Perhaps you should try some spelling variations:
plant lice » plant life
wang can » wang yan, wang dan, wang yang
wang ban » wang yan, wang dan, wang yang
oil coal » oil cost, oil oil, oil can
plant li » plant life, plant oil, plant mix
hong hai » shang hai, zhong tai, dang hai
hong yu » wong yue

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

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