Perhaps you should try some spelling variations:
thien van » thi van
van thanh » ban thanh, van tuan
va triet » va thiet, va trien, ve triet
thanh vi » hanh vi, thanh va, thanh ve
nam thuc » nam thuoc, am thuc, nam thu
nam luc » nang luc, nhan luc, nam duoc
cao hoi » cau hoi, co hoi, cao hoc
dang ky » dang y, dan ky, dong ky
san ky » sang ky, van ky, dan ky
vi va » vi van, vai va, vu va

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: te ((san ky) OR (dang ky)) nang cao hoi. thien van ((nam luc) OR (nam thuc)) van thanh vi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((san ky) or (dang ky)) nang cao hoi. thien van ((nam luc) OR (nam thuc)) van thanh vi va triet~".
• Adding a wildcard symbol may retrieve word variants: te ((san ky) or (dang ky)) nang cao hoi. thien van ((nam luc) OR (nam thuc)) van thanh vi va triet*.