Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
tranh cua » doanh cua, manh cua
dung cong » dung trong
doc hieu » toc thieu, hoc thieu, hoc hien
cua dung » cua dang, cua dong, qua dung
cong dan » cong san, cong tan, huong dan
han tap » toan tap, nhan tai, nhan tao
han tai » hang tai, nhan tai, van tai

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 - canh tranh cua dung cong dan ((han tap) OR (han tai))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - canh tranh cua dung cong dan ((han tap) OR (han tai))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh tranh cua dung cong dan ((han tap) OR (han tai))*.