Perhaps you should try some spelling variations:
wang tan » wang yan, wang ban, wang dan
oil chad » oil can, oil coal
liang li » ling li, qiang li, liang wei
hong hai » shang hai, zhong tai, dang hai
wang yue » wang hua, wang yan, wang he
wong yue » hong yu
tan tan » tas tan, tin tan, tang tang
tan oil » than oil, can oil, oman 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 tan tan oil chad liang li ((hong hai) or (((wang yue) OR (wong yue)))) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang tan tan oil chad liang li ((hong hai) OR (((wang yue) OR (wong yue)))) ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang tan tan oil chad liang li ((hong hai) or (((wang yue) OR (wong yue)))) ;".
• Adding a wildcard symbol may retrieve word variants: wang tan tan oil chad liang li ((hong hai) or (((wang yue) OR (wong yue)))) ;*.