Perhaps you should try some spelling variations:
sach tu » sach thu, cach tu, sach ty
hieu ve » hieu va, hieu van
cao suc » cao su, cao duc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cao » va cao, ve bao, ve cac
suc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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: su ((sach y) OR (sach tu)) nang x ho. hieu ve cao suc va hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: su ((sach y) or (sach tu)) nang x ho. hieu ve cao suc va hanh vi cua tre*.