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, te sach, tu cach
su sach » so sach, vu sach
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao

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