Perhaps you should try some spelling variations:
plant lice » plant life
zhong zhi » zhang zhi, hong ghi, zhong tai
oil coal » oil cost, oil oil, oil can
plant li » plant life, plant oil, plant mix
wang yue » wong yue, wang hua, wang he
yan can » yan clan, man can, yan cong
can oil » can soils, can only, corn oil

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 can oil coal ((plant li) or (plant lice)) ((zhong zhi) or (wang yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan can oil coal ((plant li) OR (plant lice)) ((zhong zhi) OR (wang yue)) ;.
• Adding a wildcard symbol may retrieve word variants: wang yan can oil coal ((plant li) or (plant lice)) ((zhong zhi) or (wang yue)) ;*.