Perhaps you should try some spelling variations:
cost liang » cost land, cost loans
than coal » than modal, than cost, when coal
liang wei » xiang wei, zhang wei, wang wei
zhong tai » hong tan, hong hai, zhong zhi
wang ban » wang dan, wang yang, bang bang
than oil » than only, than one, than our
yan » yang, 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 ((than oil) or (than coal)) cost liang wei ((zhong tai) or (wang yan)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ban ((than oil) OR (than coal)) cost liang wei ((zhong tai) OR (wang yan)) ;.
• Adding a wildcard symbol may retrieve word variants: wang ban ((than oil) or (than coal)) cost liang wei ((zhong tai) or (wang yan)) ;*.