Perhaps you should try some spelling variations:
doanh doanh » toan doanh, doanh hoan, doanh thanh
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
va thong » va thuong, va phuong, he thong
cong dan » cong san, cong tan, huong dan
phan cac » phan dau, phan lap, phan van
ho hieu » ho chieu, hoi hieu, nho hieu

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 lang - ((doanh doanh) or (kinh doanh)) va thong cong dan ((phan cac) or (nhan cach))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((doanh doanh) OR (kinh doanh)) va thong cong dan ((phan cac) OR (nhan cach)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((doanh doanh) or (kinh doanh)) va thong cong dan ((phan cac) or (nhan cach))*.