Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trinh » canh tranh, hanh chinh
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
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: ho chieu xanh - ((tinh quang) or (hanh trinh)) va ((hang cong) or (dang cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((tinh quang) OR (hanh trinh)) va ((hang cong) OR (dang cong)) tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((tinh quang) or (hanh trinh)) va ((hang cong) or (dang cong)) tac toan cau*.