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

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