Perhaps you should try some spelling variations:
wang anh » dang anh, wang yang, wang yan
tran van » trang van, trang vang, frans van
yang jin » yang jie, yang jun, ying jin
yang jui » yang judy, yang di, yang xi
wong sam » wong sau, wong lai, kong sar
tran vu » tuan vu, tran duc
yang yi » yang di, yang xi

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

• If you are trying to use Boolean operators, they must be ALL CAPS: wang anh ((tran vu) OR (tran van)) chen ((((yang jin) OR (yang yi))) OR (yang jui)) wong sam ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang anh ((tran vu) OR (tran van)) chen ((((yang jin) or (yang yi))) or (yang jui)) wong sam ;~".
• Adding a wildcard symbol may retrieve word variants: wang anh ((tran vu) OR (tran van)) chen ((((yang jin) or (yang yi))) or (yang jui)) wong sam ;*.