Perhaps you should try some spelling variations:
zhong tai » hong tan, hong hai, zhong zhi
wang yang » wang yan, wang liang, wang yanling
wang dan » wang yan, wang ban, wang yidan
dan phan » van phan, dan pelan, dan pad
oil coal » oil can, oil chad
liang li » ling li, qiang li, liang wei
oil oil » coal oil

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

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