Perhaps you should try some spelling variations:
dai hoi » dai hai, dai moi
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
tu nam » su nam
nam ky » cam ky, nam ly
ma hoi » mai hoi, xa hoi, ma hoa
ve cam » ve cham, ve cac, va cam
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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 (((dai hoi) OR (dai hoc)))). hieu ve cam xuc va hanh vi cua tre~.
• Adding a wildcard symbol may retrieve word variants: tu nam ky nang ((ma hoi) or (((dai hoi) or (dai hoc)))). hieu ve cam xuc va hanh vi cua tre*.