Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
tong thong » thong thong, dong thong, cong thong
theo hieu » theo chieu, theo tieu, thien hieu
doanh cua » doanh luan
cua tong » cua cong, cua dong, cua nong
van nhan » van phan, van thanh, danh nhan
van han » van hanh, van phan, van hoan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu qua - hanh doanh cua tong thong ((van han) or (van nhan)) tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu qua - hanh doanh cua tong thong ((van han) OR (van nhan)) tai.
• Adding a wildcard symbol may retrieve word variants: theo hieu qua - hanh doanh cua tong thong ((van han) or (van nhan)) tai*.