Perhaps you should try some spelling variations:
cua triet » cua viet, va triet
su triet » su viet, su tien, ve triet
quoc ban » quoc bao, quoc lan, quoc quan
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
tu sac » tu sach, tu cac, tu san

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 sac ky sang ma hoi. hieu ve cham ((cua ban) OR (quoc ban)) hanh vi ((cua triet) OR (su triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang ma hoi. hieu ve cham ((cua ban) or (quoc ban)) hanh vi ((cua triet) OR (su triet))~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ma hoi. hieu ve cham ((cua ban) or (quoc ban)) hanh vi ((cua triet) OR (su triet))*.