Perhaps you should try some spelling variations:
tieu sach » chieu sach, dien sach, te sach
tranh kha » tranh ha, tranh chap, trinh khai
nang cong » nang song, dang cong, bang cong
kha nang » phap nang, ky nang, ki nang
cong tac » cong ty
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sach - canh tranh kha nang cong tac ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sach - canh tranh kha nang cong tac ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sach - canh tranh kha nang cong tac ((toan cau) or (toan cao))*.