Perhaps you should try some spelling variations:
long trinh » long trip, long thanh
than china » tuan china, han china, wuhan china
chang yang » chen yang, wang yang, zhang yan
tan china » tuan china, can china, dan china
yang hyun » yang yun, yang jun, sang hyup
hyun song » yun song, kyu song

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

• Performing a fuzzy search may retrieve terms with similar spellings: long trinh ((tan china) or (than china)) chang yang hyun song (shin or thin) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: long trinh ((tan china) OR (than china)) chang yang hyun song (shin OR thin) ;*.