Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
hanh vai » hanh va, hanh tai, hanh van
mai hoi » mai khoi, dai hoi, lai hoi
cau luc » cau truc, cau phuc
qua cau » quan cau, qua cac, qua ca
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
ma hoi » xa hoi, ma hoa, me hoi
luc va » duc va, tuc va, loc va
su sac » su sach, su cac, su xac

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: su sac ky tang ((ma hoi) OR (mai hoi)). hieu qua cau luc va ((hanh vai) OR (hanh vi)) va triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang ((ma hoi) OR (mai hoi)). hieu qua cau luc va ((hanh vai) or (hanh vi)) va triet~".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang ((ma hoi) OR (mai hoi)). hieu qua cau luc va ((hanh vai) or (hanh vi)) va triet*.