Perhaps you should try some spelling variations:
bo sach » co sach, hoc sach
cua tre » cua te, cua triet, dua tren
van anh » van thanh, tuan anh, van minh
soc van » hoc van, oc van, sac van
sach ky » sac ky, sach y, sach ty
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
lang xa » lang ha, dang xay, lang van
nang xa » nang x, nang ma, mang xa
cuu tre » cau tren, cau treo
anh vi » hanh vi, anh va, anh ve

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

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