Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
lam thuc » lam thuoc, am thuc, nam thuc
vat hanh » vat thanh, van hanh, va hanh
ban hanh » ban hang
su sach » so sach, vu sach
van lam » van nam
doi cua » dai cua, hoi cua
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
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 y nang x hoi. hieu van lam thuc ((vat hanh) or (ban hanh)) doi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach y nang x hoi. hieu van lam thuc ((vat hanh) OR (ban hanh)) doi cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach y nang x hoi. hieu van lam thuc ((vat hanh) or (ban hanh)) doi cua tre*.