Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh vai » hanh vi, hanh va, hanh tai
van hanh » van thanh, ban hanh, van anh
phan duc » pham duc, phan tu, phan dau
lieu van » lieu va, hieu van, sieu van
van phan » van phong, van thanh, luan phan
sach ly » sach y, sach ty, sach hay
sach lo » sach dao, sach doi, sach hoi
duc van » duc va, duc tan, duc manh
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach ly) or (sach lo)) nang x hoi. lieu van phan duc van hanh vai ((cua tre) or (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ly) OR (sach lo)) nang x hoi. lieu van phan duc van hanh vai ((cua tre) OR (su triet)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach ly) or (sach lo)) nang x hoi. lieu van phan duc van hanh vai ((cua tre) or (su triet))*.