Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
vuc van » duc van, luc van, thuc van
xuc van » duc van, luc van, xuc ban
hieu ve » hieu va, hieu van
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
ve cac » va cac, vien cac
anh vi » hanh vi, anh va, anh ve
cua cu » cua chu, cua cau, cua su

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ky tang xa hoi. hieu ve cac ((xuc van) or (vuc van)) anh vi ((cua tre) or (cua cu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. hieu ve cac ((xuc van) OR (vuc van)) anh vi ((cua tre) OR (cua cu)).
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. hieu ve cac ((xuc van) or (vuc van)) anh vi ((cua tre) or (cua cu))*.