Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hoc thieu » toc thieu, hoc hien
hanh tang » anh tang, hanh mang, hanh tung
dung cong » dung trong
hoc hieu » hoc hien, doc hieu, hoc dieu
qua dung » quang dung, su dung, qua song
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than ban » thanh ban, toan ban, than man

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 (hoc thieu)) lang - ((hanh tang) or (hanh trang)) qua dung cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (hoc thieu)) lang - ((hanh tang) OR (hanh trang)) qua dung cong dan than ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (hoc thieu)) lang - ((hanh tang) or (hanh trang)) qua dung cong dan than ban".
• Adding a wildcard symbol may retrieve word variants: ((hoc hieu) OR (hoc thieu)) lang - ((hanh tang) or (hanh trang)) qua dung cong dan than ban*.