Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
canh manh » lanh manh, canh tranh, cach mang
cong cong » cong dong, dung cong, dang cong
doc hieu » toc thieu, hoc thieu, hoc hien
manh cua » doanh cua, ban cua
dan toan » van toan, dan than, manh toan
toan ban » van ban

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 manh cua ((cong cong) OR (trong cong)) dan toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - canh manh cua ((cong cong) OR (trong cong)) dan toan ban*".