Perhaps you should try some spelling variations:
mai khoi » mai khoa, tai khoa, cac khoi
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vu sai » vu hai, vu san, vu dai
sai ky » sac ky
ma hoi » mai hoi, xa hoi, me hoi
ve cac » va cac, vien cac
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sai ky nang ((((ma hoi) or (mai khoi))) or (ma hoa)). hieu ve cac nuoc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sai ky nang ((((ma hoi) OR (mai khoi))) OR (ma hoa)). hieu ve cac nuoc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: vu sai ky nang ((((ma hoi) or (mai khoi))) or (ma hoa)). hieu ve cac nuoc va hanh vi cua tre*.