Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
cong cap » cung cap, cong cau, cong lap
cong cac » cuong cac, cong tac, cong cau
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, van 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: hoc ((chieu xanh) or (hieu manh)) - thanh ((cong cap) OR (cong cac)) truong cong ban toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (hieu manh)) - thanh ((cong cap) OR (cong cac)) truong cong ban toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (hieu manh)) - thanh ((cong cap) OR (cong cac)) truong cong ban toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (hieu manh)) - thanh ((cong cap) OR (cong cac)) truong cong ban toan cau*.