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