Perhaps you should try some spelling variations:
thien van » thi van
van thanh » ban thanh, van tuan
thanh vi » hanh vi, thanh va, thanh ve
nhan luc » nang luc
su viet » so viet
nam luc » nang luc, nam thuc, nam duoc
cao hoi » cau hoi, co hoi, cao hoc
sang ky » sang kyo, dang ky, tang ky
ban ky » van ky, dan ky
vi su » va su, ve su, ki su

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((ban ky) or (sang ky)) nang cao hoi. thien van ((nam luc) OR (nhan luc)) van thanh vi su viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((ban ky) OR (sang ky)) nang cao hoi. thien van ((nam luc) OR (nhan luc)) van thanh vi su viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((ban ky) or (sang ky)) nang cao hoi. thien van ((nam luc) OR (nhan luc)) van thanh vi su viet".
• Adding a wildcard symbol may retrieve word variants: te ((ban ky) or (sang ky)) nang cao hoi. thien van ((nam luc) OR (nhan luc)) van thanh vi su viet*.