Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
cao hoi » cau hoi, cao hoc, tao hoi
van cam » van nam, van lam, van cau
lai cua » dai cua, hai cua, lai chau
tu sac » tu sach, tu cac, tu san
sac ky » cac ky, sai ky
co hoi » co hoc, co loi

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 ((cao hoi) OR (co hoi)). hieu van cam xuc ((ban hanh) OR (ban hang)) lai cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky nang ((cao hoi) or (co hoi)). hieu van cam xuc ((ban hanh) OR (ban hang)) lai cua triet~".
• Adding a wildcard symbol may retrieve word variants: tu sac ky nang ((cao hoi) or (co hoi)). hieu van cam xuc ((ban hanh) OR (ban hang)) lai cua triet*.