Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu va » lieu va, hieu qua
cac luc » cau luc, coc luc, cac nuoc
va kinh » va tinh, qua kinh
kinh ca » kinh can, tinh ca, kinh co
cua tre » cua te, cuu tre, dua tren
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
ma hoi » mai hoi, ma hoa, me hoi
luc va » duc va, tuc va, loc va

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 nang ((ma hoi) OR (xa hoi)). hieu va cac luc va kinh ca ((cua tre) OR (cua triet))~.
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((ma hoi) or (xa hoi)). hieu va cac luc va kinh ca ((cua tre) or (cua triet))*.