Perhaps you should try some spelling variations:
vien thinh » tien thinh, vien thanh, viet thinh
thinh sach » chinh sach, tinh sach, sinh sach
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
tac toan » tap toan, tam toan, hach toan
toan cau » 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: vien thinh sach - hanh tranh cua ((hang cong) or (bang cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vien thinh sach - hanh tranh cua ((hang cong) OR (bang cong)) tac toan cau.
• Adding a wildcard symbol may retrieve word variants: vien thinh sach - hanh tranh cua ((hang cong) or (bang cong)) tac toan cau*.