Perhaps you should try some spelling variations:
yan hoang » tran hoang, tan hong, anh hoang
gang gong » gongs gong, gang sung, gong gang
hoang sy » hoang vu
hong hai » shang hai, zhong tai, dang hai
wong yue » wang yue, hong yu
gong di » dong di, gong si, long did
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yan hoang sy gang gong di ((hong hai) or (wong yue)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan hoang sy gang gong di ((hong hai) OR (wong yue)) ;*.