Perhaps you should try some spelling variations:
chau triet » cua triet, cau trieu, chau tuyet
cau triet » cau trieu, su triet, cua triet
hanh lai » hanh lam, hanh tai, thanh lap
te sach » toc sach
cao hoi » cau hoi, co hoi, cao hoc
van cam » van lam, van cau, van dam
va hanh » van hanh, va thanh, va danh
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: te sach y nang cao hoi. hieu ((van cam) OR (van nam)) duc va hanh lai ((chau triet) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang cao hoi. hieu ((van cam) OR (van nam)) duc va hanh lai ((chau triet) OR (cau triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang cao hoi. hieu ((van cam) OR (van nam)) duc va hanh lai ((chau triet) or (cau triet))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang cao hoi. hieu ((van cam) OR (van nam)) duc va hanh lai ((chau triet) or (cau triet))*.