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
va triet » va thiet, va trien, ve triet
doc hoi » duoc hoi, hoc hoi, doc hai
nam luc » nhan luc, nam thuc, nam duoc
sac ky » cac 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 ((sac ky) OR (sai ky)) nang doc hoi. thien van ((nam luc) OR (nang luc)) van thanh vi va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sac ky) OR (sai ky)) nang doc hoi. thien van ((nam luc) or (nang luc)) van thanh vi va triet~".
• Adding a wildcard symbol may retrieve word variants: te ((sac ky) OR (sai ky)) nang doc hoi. thien van ((nam luc) or (nang luc)) van thanh vi va triet*.