Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
hanh mang » nhanh mang, hanh trang, nhanh lang
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
mang cua » manh cua, dung cua, ban cua
cua dung » cua dang, cua dong, qua dung
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca
van chat » cao chat

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 - hanh mang cua dung cong ((dan than) or (((dan chan) OR (van chat)))) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh mang cua dung cong ((dan than) OR (((dan chan) OR (van chat)))) ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh mang cua dung cong ((dan than) or (((dan chan) OR (van chat)))) ban*".