Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
doc hieu » hoc thieu, hoc hien
doanh va » doan va, doanh tai, doanh cua
phi cong » thi cong, phan cong, pham cong
cong son » cong san, cong so, dong son
son hoa » so hoa, mon hoa, son ha
va phi » va chi, va phe, va pha

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (toc thieu)) lang - hanh doanh va phi cong son hoa co~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) lang - hanh doanh va phi cong son hoa co*.