Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hieu van » hieu va, thien van, lieu va
hanh lai » hanh tai, thanh lap, thanh loi
hanh lam » thanh lap, hanh kem, hanh va
cao hoi » cau hoi, cao hoc, tao hoi
van cam » van nam, van lam, van cau
xuc ban » duc ban, cuc ban, quoc ban
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 lai) OR (hanh lam)) 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 lai) OR (hanh lam)) 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 lai) OR (hanh lam)) cua triet*.