Perhaps you should try some spelling variations:
ve triet » va trien, su triet
vuc nang » cuc nang, vu nang, chuc nang
thanh vi » hanh vi, thanh va, thanh ve
va thanh » gia thanh, ban thanh, va tinh
voi nang » voi hang, hoi nang, voi rang
vao truc » vao thuc, cau truc, dao tuc
truc va » thuc va, thuc vat, trung va
su sach » so sach, vu sach
hoc hoi » hoc khoi, hoc hoa, hoc noi
va nang » van nang, da nang, cam nang
va vao » va van, va dao, va bao
vi ve » va ve, gi ve, ve ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ((((vuc nang) or (voi nang))) or (va nang)) hoc hoi. lieu va vao truc va thanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((((vuc nang) OR (voi nang))) OR (va nang)) hoc hoi. lieu va vao truc va thanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: su sach ((((vuc nang) or (voi nang))) or (va nang)) hoc hoi. lieu va vao truc va thanh vi ve triet*.