Perhaps you should try some spelling variations:
nhanh tinh » nhanh thanh, hanh trinh, nhan sinh
quang dung » quang trung, ung dung, cuong dung
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
cua dang » cua cong, cua ban
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: doc hieu xanh - nhanh tinh ((((quang dung) or (qua song))) or (cua dang)) cong dan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - nhanh tinh ((((quang dung) OR (qua song))) OR (cua dang)) cong dan than ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - nhanh tinh ((((quang dung) or (qua song))) or (cua dang)) cong dan than ban*.