Perhaps you should try some spelling variations:
vat thanh » dat thanh, gat thanh, tat thanh
nang cau » nang cao, hang cau, nang dau
hoc sach » hoc sinh, hoc cac, hoc anh
lam thuc » lam thuoc, am thuc, nam thuc
thanh vi » hanh vi, thanh va, thanh ve
so sanh » do sanh
hieu de » hieu ve, hieu he, hieu le
v nang » va nang, vu nang, van nang
de lam » da lam, de la, se lam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (so sanh)) v nang cau hoi. hieu de lam thuc vat thanh vi ((cua vat) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (so sanh)) v nang cau hoi. hieu de lam thuc vat thanh vi ((cua vat) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (so sanh)) v nang cau hoi. hieu de lam thuc vat thanh vi ((cua vat) or (hoa viet))*.