Perhaps you should try some spelling variations:
cong tran » tung tran
you liang » you xian, you liangzhi
lang yan » wang yan, wang yang, zhang yan
yang jie » yang jin, yang di, yang jui
yan wang » yuan wang, yang yang, qian wang
cong van » congo can, duong van, cong sun
hoang sy » hoang vu

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

• Performing a fuzzy search may retrieve terms with similar spellings: lang yan ((yang jie) or (((yan wang) or (you liang)))) li ((cong tran) OR (cong van)) hoang sy ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: lang yan ((yang jie) OR (((yan wang) OR (you liang)))) li ((cong tran) OR (cong van)) hoang sy ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "lang yan ((yang jie) or (((yan wang) or (you liang)))) li ((cong tran) OR (cong van)) hoang sy ;*".