Perhaps you should try some spelling variations:
phan dung » phan ung, phan dang, chan dung
dung cong » dung trong
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 dung cong dan gian dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (toc thieu)) nganh - van dan phan dung cong dan gian dan".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (toc thieu)) nganh - van dan phan dung cong dan gian dan*.