Perhaps you should try some spelling variations:
hanh trang » thanh trung, hanh trinh, minh trang
nhung cong » dung cong, thong cong, hang cong
doi chieu » doc hieu, doi chi, mot chieu
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, mot 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) OR (doi chieu)) sang - ((hanh trang) or (canh tranh)) cua nhung cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) sang - ((hanh trang) OR (canh tranh)) cua nhung cong tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) sang - ((hanh trang) or (canh tranh)) cua nhung cong tac toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sang - ((hanh trang) or (canh tranh)) cua nhung cong tac toan cau*.