Perhaps you should try some spelling variations:
wang yong » wang yang, wang hyoung, wang yan
yong yang » yang yang, dong yang, ying yang
yang oil » yang zili, yang di, yang xi
oil line » rail line
hong hai » shang hai, zhong tai, dang hai
wong yue » wang yue, hong yu
oil oil » coal oil
line hi » line how

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yong yang oil oil line hi ((hong hai) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yong yang oil oil line hi ((hong hai) OR (wong yue)) ;*.