Perhaps you should try some spelling variations:
hanh hang » thanh hang, hang hang, hanh han
hoi hieu » hoi phieu, hoi tieu, doi chieu
moi hieu » moi dieu, doi chieu, mot chieu
va thong » va thuong, va phuong, he thong
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
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: ((hoi hieu) or (moi hieu)) lang - hanh hang va thong ((cong dan) or (cong tan)) than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoi hieu) OR (moi hieu)) lang - hanh hang va thong ((cong dan) OR (cong tan)) than ban.
• Adding a wildcard symbol may retrieve word variants: ((hoi hieu) or (moi hieu)) lang - hanh hang va thong ((cong dan) or (cong tan)) than ban*.