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
cong san » cong tac
cong tan » cong tac, cong thanh, cong ty
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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 cong ((cong san) or (cong tan)) ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vien thinh sach - hanh tranh cua cong ((cong san) OR (cong tan)) ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: vien thinh sach - hanh tranh cua cong ((cong san) or (cong tan)) ((toan tai) or (toan ban))*.