Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh tang » hanh trang, anh tang, hanh mang
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan ban » can ban, chat ban, chan nan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) or (toc thieu)) lang - ((hanh tang) or (hanh trinh)) qua dung cong dan chan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (toc thieu)) lang - ((hanh tang) OR (hanh trinh)) qua dung cong dan chan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) or (toc thieu)) lang - ((hanh tang) or (hanh trinh)) qua dung cong dan chan ban*.