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
tu sach » thu sach, su sach, te sach
cao hoi » cau hoi, co hoi, cao hoc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
va cam » va cham, va cao, va cai

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 y nang cao hoi. hieu ((va cam) OR (va cac)) duc va hanh lai ((chau triet) or (cau triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y nang cao hoi. hieu ((va cam) OR (va cac)) duc va hanh lai ((chau triet) OR (cau triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y nang cao hoi. hieu ((va cam) OR (va cac)) duc va hanh lai ((chau triet) or (cau triet))".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang cao hoi. hieu ((va cam) OR (va cac)) duc va hanh lai ((chau triet) or (cau triet))*.