Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hieu van » hieu va, thien van, lieu va
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu ve » hieu va
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
va cua » va chua, via cua, ca cua

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 ky nang xa hoi. ((hieu ve) or (hieu van)) cam duc va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach ky nang xa hoi. ((hieu ve) OR (hieu van)) cam duc va hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach ky nang xa hoi. ((hieu ve) or (hieu van)) cam duc va hanh va cua tre*.