Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
chiet tach » chieu sach
hieu quan » hieu qua, lieu quan, thien quan
tranh cua » doanh cua, manh cua
cua thong » cua thuong, cua khong, cua tong
cong hai » cong thai, cong ha, hoang hai
hai ta » hai tan, hai tap, hai ba
ta cau » tao cau, tra cau, va cau

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 quan) or (chiet tach)) - canh tranh cua thong cong hai ta cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu quan) OR (chiet tach)) - canh tranh cua thong cong hai ta cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quan) or (chiet tach)) - canh tranh cua thong cong hai ta cau*.