Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh lai » hanh lam, hanh tai, thanh lap
van hanh » van thanh, ban hanh, van anh
cham duc » pham duc, pham duy, phan duc
lai cua » dai cua, hai cua, lai chau
tu sach » thu sach, su sach, tu cach
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
te sach » toc sach
x hoi » xa hoi, o hoi, x ho

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)) ty nang x hoi. hieu ve ((cham duc) OR (cham soc)) van hanh lai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang x hoi. hieu ve ((cham duc) OR (cham soc)) van hanh lai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (te sach)) ty nang x hoi. hieu ve ((cham duc) OR (cham soc)) van hanh lai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (te sach)) ty nang x hoi. hieu ve ((cham duc) OR (cham soc)) van hanh lai cua triet*.