Perhaps you should try some spelling variations:
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
gian lang » gian dan
doc hieu » hoc thieu, hoc hien
van cong » van dong, van phong, phan cong

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