Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
trinh toan » tinh toan, thanh toan, trinh han
doi chieu » doc hieu, doi chi, mot chieu
ho chieu » theo chieu, hoc thieu, mot chieu
trung ha » trung hoc, trung tam, trung cap
toan cau » toan cao, toan ban, toan tap
tung ho » tuong ho, trung hoc, trung hoa

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)) xanh - thanh ((tung ho) or (trung ha)) khong cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (doi chieu)) xanh - thanh ((tung ho) OR (trung ha)) khong cong trinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (doi chieu)) xanh - thanh ((tung ho) or (trung ha)) khong cong trinh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) xanh - thanh ((tung ho) or (trung ha)) khong cong trinh toan cau*.