Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh hai » thanh hai, nhanh hai, hang hai
van hanh » van thanh, ban hanh, van anh
cac cong » cua cong
hai cua » thai cua, dai cua, hoi cua
tu sach » thu sach, te sach, tu cach
nang ro » nang co, nang ho, nang ra
hieu ve » hieu va, hieu van
su sach » so sach, vu sach
ro hoi » co hoi, o hoi, mo hoi

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)) ky nang ro hoi. hieu ve ((cac co) or (cac cong)) van hanh hai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (su sach)) ky nang ro hoi. hieu ve ((cac co) OR (cac cong)) van hanh hai cua triet.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (su sach)) ky nang ro hoi. hieu ve ((cac co) or (cac cong)) van hanh hai cua triet*.