Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu nganh » vien nganh, hiem ngan, nghiep nganh
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, dieu hanh, hien hanh
hieu manh » chieu xanh, dieu hanh, hien hanh
trung va » truong va, trang va, trung ha
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: doc ((hieu xanh) or (((hieu manh) or (hieu nganh)))) - thanh trung va nhung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (((hieu manh) OR (hieu nganh)))) - thanh trung va nhung cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (((hieu manh) or (hieu nganh)))) - thanh trung va nhung cong san toan cau*.