Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
ban hanh » ban hang
thuc ban » thuoc ban, thuc dan, thu ban
cau thuc » cau truc, cuu thuc, can thuc
tai cua » thai cua, tai cuc, tri cua
cua tre » cua te, cuu tre, cua triet
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sach tu) or (sach y)) nang xa hoi. ((hieu ve) or (hieu qua)) cau thuc ban hanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach tu) OR (sach y)) nang xa hoi. ((hieu ve) OR (hieu qua)) cau thuc ban hanh tai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sach tu) or (sach y)) nang xa hoi. ((hieu ve) or (hieu qua)) cau thuc ban hanh tai cua tre*.