Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
xanh hanh » danh thanh, ban hanh, van hanh
hieu van » hieu va, thien van, lieu va
hanh lai » hanh lam, hanh tai, thanh lap
duc xanh » duc anh, duc manh, duc hanh
cao hoi » cau hoi, cao hoc, tao hoi
van cao » van dao, van bao, van hao
cao duc » dao duc, cao suc, giao duc
te sach » toc sach
lai cua » dai cua, hai cua, lai chau
tu sach » thu sach, su sach, tu cach
co hoi » co hoc, co loi
y nang » ky nang, ly nang, v nang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (te sach)) y nang ((cao hoi) or (co hoi)). hieu van cao duc xanh hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) y nang ((cao hoi) OR (co hoi)). hieu van cao duc xanh hanh lai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) y nang ((cao hoi) or (co hoi)). hieu van cao duc xanh hanh lai cua triet*.