Perhaps you should try some spelling variations:
than coal » than modal, than cost, than oil
coal coal » coal oil, coal cold, oil coal
liang wei » xiang wei, zhang wei, wang wei
zhong tai » hong tan, hong hai, zhong zhi
wang ryan » wang yan, wang yang, wang dan
wang ban » wang yan, wang dan, wang yang
ban than » van thanh

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 coal coal liang wei ((zhong tai) or (wang ryan)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ban than coal coal liang wei ((zhong tai) OR (wang ryan)) ;.
• Adding a wildcard symbol may retrieve word variants: wang ban than coal coal liang wei ((zhong tai) or (wang ryan)) ;*.