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