Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cua tre » cuu tre, cua triet, dua tren
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
luc va » duc va, tuc va, loc va
xuc va » duc va, tuc va, xac va
sach v » sach va, sach y, sach 2
va cam » va cham, va cac, va cao
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang
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: hoc sach v nang ma hoi. hieu va cam ((xuc va) or (luc va)) hanh vi ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach v nang ma hoi. hieu va cam ((xuc va) OR (luc va)) hanh vi ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: hoc sach v nang ma hoi. hieu va cam ((xuc va) or (luc va)) hanh vi ((cua tre) or (cua te))*.