Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
hanh via » hanh vi, hanh va, anh va
ban hanh » ban hang
hoc anh » hoc nganh, hoc nhanh, ngoc anh
via cua » gia cua, gian cua, giau cua
luc ban » duc ban, cuc ban, luc bat
cam luc » cam xuc, cau luc
cua tre » cua te, cuu tre, cua triet
hoc cac » hoc cao
nang ma » tang ma, sang ma, nang cao
ma hoi » mai hoi, xa hoi, ma hoa
v nang » va nang, vu nang, van nang

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) or (hoc cac)) v nang ma hoi. ((hieu qua) or (hieu quan)) cam luc ban hanh via cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc anh) OR (hoc cac)) v nang ma hoi. ((hieu qua) OR (hieu quan)) cam luc ban hanh via cua tre.
• Adding a wildcard symbol may retrieve word variants: ((hoc anh) or (hoc cac)) v nang ma hoi. ((hieu qua) or (hieu quan)) cam luc ban hanh via cua tre*.