Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
hoc sach » hoc sinh, hoc cac, hoc anh
nang xa » nang x, lang xa, nang ma
cam luc » cam xuc, cau luc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
luc va » duc va, tuc va, loc va
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 v nang xa hoi. ((hieu qua) or (hieu quan)) cam luc va hanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sach v nang xa hoi. ((hieu qua) OR (hieu quan)) cam luc va hanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc sach v nang xa hoi. ((hieu qua) or (hieu quan)) cam luc va hanh va cua tre*.