Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
toc sach » hoc sach, doc sach, thuoc sach
thanh vi » thanh va, thanh ve, nhanh vi
cao hoi » cau hoi, co hoi, cao hoc
qua cac » cua cac
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((toc sach) or (thuat sach)) ky nang cao hoi. hieu qua cac xuc va ((thanh vi) or (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((toc sach) OR (thuat sach)) ky nang cao hoi. hieu qua cac xuc va ((thanh vi) OR (hanh vi)) cua tre.
• Adding a wildcard symbol may retrieve word variants: ((toc sach) or (thuat sach)) ky nang cao hoi. hieu qua cac xuc va ((thanh vi) or (hanh vi)) cua tre*.