Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
dung cong » dung trong
gian cham » gian cua, gian cac, gian ha
doc hieu » toc thieu, hoc thieu, hoc hien
dung dan » dung dat, dung san, tung dan
van dung » van dong, xay dung, tin dung
cong van » cong vang, cong san, song van
van gian » van giang, dan gian, van giao

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 manh - ((dung dan) or (hanh doanh)) van dung cong van gian cham~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - ((dung dan) OR (hanh doanh)) van dung cong van gian cham.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - ((dung dan) or (hanh doanh)) van dung cong van gian cham*.