Perhaps you should try some spelling variations:
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
cu tren » tu tren, dua tren
tu nam » su nam
nam ky » cam ky, nam ly
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 cu » vi su, vi xu, vi du

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 nam ky nang ((ma hoi) OR (mai hoi)). hieu ve cam tuc va hanh vi cu tren~.
• Adding a wildcard symbol may retrieve word variants: tu nam ky nang ((ma hoi) or (mai hoi)). hieu ve cam tuc va hanh vi cu tren*.