Perhaps you should try some spelling variations:
hanh dinh » thanh dinh, hinh dinh, hanh tinh
nam thuc » nam thuoc, nam thu, nam tu
vat hanh » vat thanh, van hanh, va hanh
su sach » so sach, vu sach
sach ky » sac ky, sach y, sach ty
dinh cu » dinh cuu, dinh chuc, dinh chau
cu tre » cu tren, cua tre, cuu tre
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: su sach ky nang x hoi. ((hieu qua) or (lieu va)) ((nam thuc) or (am thuc)) vat hanh dinh cu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ky nang x hoi. ((hieu qua) OR (lieu va)) ((nam thuc) OR (am thuc)) vat hanh dinh cu tre.
• Adding a wildcard symbol may retrieve word variants: su sach ky nang x hoi. ((hieu qua) or (lieu va)) ((nam thuc) or (am thuc)) vat hanh dinh cu tre*.