Perhaps you should try some spelling variations:
wang liang » wang yang
wang wang » wang yang, wang yan, wang yong
rent ling » rent mailing
zhong zhi » zhang zhi, hong ghi, zhong tai
oil rent » oil rents, oil trend, oil real
wong yue » wang yue, hong yu
shale » scale, share, shape

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) or (wang liang)) shale oil rent ling li ((zhong zhi) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang wang) OR (wang liang)) shale oil rent ling li ((zhong zhi) OR (wong yue)) ;.
• Adding a wildcard symbol may retrieve word variants: ((wang wang) or (wang liang)) shale oil rent ling li ((zhong zhi) or (wong yue)) ;*.