Perhaps you should try some spelling variations:
sach thu » sach thue, sach thieu, sach tham
ban dinh » ban tinh, van dinh, ban dich
te sach » toc sach
cuu tre » cua tre, cau tren, cau treo
dinh vi » dinh ve, dinh viet, dinh tri
xuc ban » duc ban, cuc ban, quoc ban
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
nang ma » tang ma, sang ma, nang cao
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach thu ((nang x) or (nang ma)) hoi. hieu qua cac xuc ban dinh vi ((cuu tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach thu ((nang x) OR (nang ma)) hoi. hieu qua cac xuc ban dinh vi ((cuu tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: te sach thu ((nang x) or (nang ma)) hoi. hieu qua cac xuc ban dinh vi ((cuu tre) or (cua te))*.