Perhaps you should try some spelling variations:
hoang dung » hoang tung, hoang vuong, thong dung
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
ban cong » bang cong, van cong, phan cong
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, von tai
toan cao » toan tap
toan ban » van ban
cho ban » co ban, cho bac, cho can

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 - hoang dung cho ban cong dan ((((toan tai) OR (toan cao))) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hoang dung cho ban cong dan ((((toan tai) OR (toan cao))) OR (toan ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hoang dung cho ban cong dan ((((toan tai) OR (toan cao))) or (toan ban))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hoang dung cho ban cong dan ((((toan tai) OR (toan cao))) or (toan ban))*.