Perhaps you should try some spelling variations:
wang yang » wang liang, wang yanling
zhong tai » hong tan, hong hai, zhong zhi
wang ban » wang dan, bang bang, teang ban
than oil » than coal, than only, than one
oil coal » oil cost, oil oil, oil can
liang li » ling li, liang wei, liang zhi
qiang li » qiang niu, ling li, qian yi
yang » ryang
yan » ryan

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

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