Perhaps you should try some spelling variations:
quang dung » quang trung, ung dung, cuong dung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hanh manh » hanh mang, lanh manh, hoang manh
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban 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 manh - hanh manh ((cua dung) or (quang dung)) cong tan than ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - hanh manh ((cua dung) OR (quang dung)) cong tan than ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - hanh manh ((cua dung) or (quang dung)) cong tan than ban*.