Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc chieu » hoc thieu, ho chieu, hoc hien
tranh cua » doanh cua, manh cua
tong cong » cong cong, dung cong, dang 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: hoc chieu xanh - hanh tranh cua ((tong cong) or (trong cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu xanh - hanh tranh cua ((tong cong) OR (trong cong)) tac toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu xanh - hanh tranh cua ((tong cong) or (trong cong)) tac toan cau*.