Perhaps you should try some spelling variations:
phan cong » thanh cong
cong cong » cong dong, trong cong, dung cong
doc hieu » hoc thieu, hoc hien
dan phan » doan phan, dan chan, van phan
cong dan » cong san, cong tan, huong dan
gian dan » gian lang
van dan » van ban, ban dan, van dao

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 dan phan cong cong dan gian dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) nganh - van dan phan cong cong dan gian dan*.