Perhaps you should try some spelling variations:
qua cham » qua hai, qua cac, va cham
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
tu sach » thu sach, su sach, tu cach
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di cua

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) or (tu sach)) ky nang ma hoi. hieu qua cham ((xuc va) or (tuc va)) hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (tu sach)) ky nang ma hoi. hieu qua cham ((xuc va) OR (tuc va)) hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (tu sach)) ky nang ma hoi. hieu qua cham ((xuc va) or (tuc va)) hanh vi cua tre*.