Perhaps you should try some spelling variations:
vat hanh » vat thanh, van hanh, va hanh
lam thuc » lam thuoc, am thuc, nam thuc
hieu van » hieu va, thien van, lieu va
su sach » vu sach
hanh va » hang va, hanh vi
van lam » van nam
mai hoi » mai khoi, dai hoi, lai hoi
so sach » so sanh, bo sach, co sach
huu tre » huu tri, cuu tre, huu them
ma hoi » xa hoi, ma hoa, me hoi
va huu » vu huu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (so sach)) ky nang ((ma hoi) OR (mai hoi)). hieu van lam thuc vat hanh va huu tre~.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (so sach)) ky nang ((ma hoi) or (mai hoi)). hieu van lam thuc vat hanh va huu tre*.