Perhaps you should try some spelling variations:
cong phan » cong nhan, cong khan, chong phap
phan cong » thanh cong
cong cong » cong dong, trong cong, dung cong
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, van duong

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 cong cong lang gian lang~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) nganh - van cong phan cong cong lang gian lang".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) nganh - van cong phan cong cong lang gian lang*.