Perhaps you should try some spelling variations:
cau tren » dau tren, ca tren, cau treo
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
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa

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