Perhaps you should try some spelling variations:
doanh phan » doanh nhan, doan phan, doanh thanh
hoc chieu » hoc thieu, ho chieu, hoc hien
tinh cong » trinh cong, tinh cuong, minh cong
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than van » thanh van, tran van, phan van
phan va » phan van, nhan va, han va
va tinh » may tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chieu) or (toc thieu)) sang - doanh phan va tinh cong dan than van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chieu) OR (toc thieu)) sang - doanh phan va tinh cong dan than van*.