Perhaps you should try some spelling variations:
wang tan » wang ban, wang dan, wang tao
tan than » tan tan, tran thanh, tan shawn
than oil » than coal, than only, than one
oil chad » oil can, oil coal
liang li » ling li, qiang li, liang wei
hong hai » shang hai, zhong tai, dang hai
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 tan than oil chad liang li ((hong hai) or (wang yan)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang tan than oil chad liang li ((hong hai) OR (wang yan)) ;.
• Adding a wildcard symbol may retrieve word variants: wang tan than oil chad liang li ((hong hai) or (wang yan)) ;*.