Perhaps you should try some spelling variations:
minh doan » minh doanh, minh toan, minh don
dung cong » dung trong
doan nang » doan quang, doan trang, doanh sang
nang phat » nang suat, van phat
cong van » cong vang, cong san, song van
van hieu » cao hieu
hieu tra » dieu tra, hiep tran, chieu tro
phat thi » pham thi, phan thi, phap thi
thi lan » thi hanh, thi nang, thi lien
tin » tinh

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung cong van hieu tra ) or ( minh doan nang phat thi lan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung cong van hieu tra ) OR ( minh doan nang phat thi lan ))*.