Perhaps you should try some spelling variations:
truong cong » trong cong, truong dong, truong long
doanh than » doanh thanh, doanh nhan, doanh phan
hieu quan » hieu qua, lieu quan, thien quan
doi hieu » doi chieu, doc hieu, doi hien
than cac » thanh cac, phan cac, thac cac
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu quan - doanh than cac truong cong dan than cau~.
• Adding a wildcard symbol may retrieve word variants: doi hieu quan - doanh than cac truong cong dan than cau*.