Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
lam truoc » lam thuoc, nam truoc, lam truong
nam truc » nam truoc, nam thuc, nam trung
van hanh » van thanh, ban hanh, van anh
hanh dai » hanh tai, hanh dao, vanh dai
su sach » so sach, vu sach
sach vu » sach va, sach tu, sach uu
vu nang » vuc nang, va nang, vu dang
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van

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 vu nang ma hoa. hieu ve ((lam truoc) or (nam truc)) van hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach vu nang ma hoa. hieu ve ((lam truoc) OR (nam truc)) van hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: su sach vu nang ma hoa. hieu ve ((lam truoc) or (nam truc)) van hanh dai cua triet*.