Perhaps you should try some spelling variations:
dao thanh » ban thanh, tro thanh, de thanh
dac nhan » cac nhan, danh nhan, ca nhan
lam thuc » lam thuoc, am thuc, nam thuc
vu sach » vu bach, su sach, vu khach
cua tre » cua te, cua triet, dua tren
sach ky » sac ky, sach y, sach ty
cuu tre » cau tren, cau treo
va lam » van lam, va lap
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: vu sach ky nang x hoi. lieu va lam thuc ((dao thanh) or (dac nhan)) di ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ky nang x hoi. lieu va lam thuc ((dao thanh) OR (dac nhan)) di ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: vu sach ky nang x hoi. lieu va lam thuc ((dao thanh) or (dac nhan)) di ((cua tre) or (cuu tre))*.