Perhaps you should try some spelling variations:
mai hoi » mai khoi, dai hoi, lai hoi
hieu ve » hieu va, hieu van
va danh » va dinh, va dan, va hanh
van cau » van dau, van hau, van chat
me hoi » le hoi
ve cam » ve cham, ve cac, va cam
cam tu » cam thu, nam tu, dam tu
va cau » va cac, va dau, va cao

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 ((me hoi) OR (mai hoi)). hieu ve cam tu va danh ((va cau) OR (van cau)) tre~.
• Adding a wildcard symbol may retrieve word variants: tu cac ky nang ((me hoi) or (mai hoi)). hieu ve cam tu va danh ((va cau) or (van cau)) tre*.