Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
bang cong » bang song, hang cong, dung cong
dang cong » dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
nhan cua » nhat cua, nhan luc, nhan su
thi bao » thi hao, thi ba, tai bao
thi hai » thi mai, thi hanh

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 - doanh nhan cua ((bang cong) OR (dang cong)) dan ((thi bao) or (thi hai))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - doanh nhan cua ((bang cong) OR (dang cong)) dan ((thi bao) OR (thi hai)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - doanh nhan cua ((bang cong) OR (dang cong)) dan ((thi bao) or (thi hai))".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - doanh nhan cua ((bang cong) OR (dang cong)) dan ((thi bao) or (thi hai))*.