Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trang » thanh trung, canh tranh, hanh trinh
cua truong » xuan truong, cac truong, xa truong
cua trung » xuan trung, cua nhung, ba trung
ho chieu » theo chieu, hoc thieu, doi chieu
cong tac » cong ty
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 sang - hanh trang ((cua trung) or (cua truong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sang - hanh trang ((cua trung) OR (cua truong)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sang - hanh trang ((cua trung) or (cua truong)) cong tac toan cau*.