Perhaps you should try some spelling variations:
lam truoc » lam thuoc, nam truoc, lam truong
hieu van » hieu va, thien van, lieu va
cam truc » cau truc, nam truc, nam truoc
ve triet » va trien, su triet
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
va danh » va dinh, va dan, va hanh
danh ke » dan ke, danh kien, doanh ket
te sai » te tai, te bai, te lai
sai ky » sac ky
ke ve » ke va, ke he, de ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sai ky tang xa hoi. hieu van ((cam truc) or (lam truoc)) va danh ke ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky tang xa hoi. hieu van ((cam truc) OR (lam truoc)) va danh ke ve triet.
• Adding a wildcard symbol may retrieve word variants: te sai ky tang xa hoi. hieu van ((cam truc) or (lam truoc)) va danh ke ve triet*.