Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hiem ngan » kim ngan, viem gan
hieu xanh » chieu xanh, hieu manh, hieu nganh
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 (((dieu hanh) or (hiem ngan)))) - 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 (((dieu hanh) OR (hiem ngan)))) - thanh trung va nhung cong san toan cau.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (((dieu hanh) or (hiem ngan)))) - thanh trung va nhung cong san toan cau*.