Perhaps you should try some spelling variations:
dua tren » dung tren
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
tu cam » tu cham, tu nam, tu can
ma hoi » xa hoi, ma hoa, me hoi
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
vi dua » vi du, vi dum, vi lua

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cam) OR (tu cac)) ky nang ((ma hoi) OR (mai hoi)). hieu ve cam tuc va hanh vi dua tren~.
• Adding a wildcard symbol may retrieve word variants: ((tu cam) or (tu cac)) ky nang ((ma hoi) or (mai hoi)). hieu ve cam tuc va hanh vi dua tren*.