Perhaps you should try some spelling variations:
phan cong » thanh cong
cong phan » cong nhan, cong khan, chong phap
phan dung » phan ung, phan dang, chan dung
dung cong » dung trong
cong lang » cong vang, cong luong, cong quang
lang gian » dan gian, nang giao, lang bien
doc hieu » hoc thieu, hoc hien
gian dan » gian lang

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)) nganh - phan cong phan dung cong lang gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) nganh - phan cong phan dung cong lang gian dan.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) nganh - phan cong phan dung cong lang gian dan*.