Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, hieu ve
van danh » van doanh, van anh, van hanh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lam duc » lam duoc, pham duc, nam duoc
duc van » duc va, duc tan, duc manh
danh de » hanh de, dan de, dang de
cua tre » cua te, cuu tre, cua triet
de cua » le cua, te cua, dieu cua
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 ky nang x hoi. ((hieu van) or (lieu va)) lam duc van danh de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang x hoi. ((hieu van) OR (lieu va)) lam duc van danh de cua tre*.