Perhaps you should try some spelling variations:
zhong tai » hong tan, hong hai
wang wang » wang yang, wang liang, wang yan
zhong zhi » zhang zhi, hong ghi
wang ban » wang yan, wang dan, wang yang
oil coal » oil cost, oil oil, oil chad
wang yue » wong yue, wang hua, wang yan
oil can » oil cake, oil chad
lang li » liang li, ling li, tang li

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 ban ((oil coal) or (oil can)) lang li ((((zhong tai) or (zhong zhi))) or (wang yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang wang ban ((oil coal) OR (oil can)) lang li ((((zhong tai) OR (zhong zhi))) OR (wang yue)) ;.
• Adding a wildcard symbol may retrieve word variants: wang wang ban ((oil coal) or (oil can)) lang li ((((zhong tai) or (zhong zhi))) or (wang yue)) ;*.