Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
dong cong » duong cong, dung cong, dang cong
cong tan » cong tac, cong san, cong thanh
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
cong cu » chung cu
cu dong » cau dong, cua dong, cum dong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((hieu nganh) or (trieu tinh)) - thanh cong cu dong cong tan ((toan cau) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu nganh) OR (trieu tinh)) - thanh cong cu dong cong tan ((toan cau) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu nganh) or (trieu tinh)) - thanh cong cu dong cong tan ((toan cau) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu nganh) or (trieu tinh)) - thanh cong cu dong cong tan ((toan cau) OR (toan cao))*.