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
van cau » van dau, van hau, van chat
me hoi » le hoi
ve cam » ve cham, ve cac, va cam
tuc va » thuc va, truc va, tuc xa
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 tuc va hanh ((va cau) OR (van cau)) tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu cac ky nang ((me hoi) or (mai hoi)). hieu ve cam tuc va hanh ((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 tuc va hanh ((va cau) OR (van cau)) tre*.