Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
hanh via » hanh va, anh va, hanh ve
luc van » luoc van, luu van, duc van
cam luc » cam xuc, cau luc
hoc anh » hoc nganh, hoc nhanh, ngoc anh
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
v nang » va nang, vu nang, van nang
anh v » anh va, anh ve, canh v

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc anh v nang xa hoi. ((hieu qua) or (hieu quan)) cam luc van ((hanh via) OR (hanh vi)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc anh v nang xa hoi. ((hieu qua) OR (hieu quan)) cam luc van ((hanh via) OR (hanh vi)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc anh v nang xa hoi. ((hieu qua) or (hieu quan)) cam luc van ((hanh via) OR (hanh vi)) cua tre".
• Adding a wildcard symbol may retrieve word variants: hoc anh v nang xa hoi. ((hieu qua) or (hieu quan)) cam luc van ((hanh via) OR (hanh vi)) cua tre*.