Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
cua tre » cuu tre, cua triet, dua tren
va hanh » van hanh, va thanh, va danh
cao xuc » cam xuc, cao duc, cao suc
sach vu » sach va, sach tu, sach uu
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
va cao » va cac, va co, va dao
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach vu ((nang xa) OR (nang ma)) hoi. hieu va cao xuc va hanh vi ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sach vu ((nang xa) OR (nang ma)) hoi. hieu va cao xuc va hanh vi ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: hoc sach vu ((nang xa) OR (nang ma)) hoi. hieu va cao xuc va hanh vi ((cua tre) or (cua te))*.