Perhaps you should try some spelling variations:
dong phan » dung phan, cong phan, dong chan
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

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