Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
thong cua » thong quan, huong cua
bang cong » dang cong, bang song, hang cong
doc hieu » toc thieu, hoc thieu, hoc hien
thong tu » phong tuc, thong tin, thong ke
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan cao » toan ban, toan tap

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 - thanh ((dung luan) or (((thong cua) OR (thong tu)))) bang cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh ((dung luan) OR (((thong cua) OR (thong tu)))) bang cong van toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh ((dung luan) or (((thong cua) OR (thong tu)))) bang cong van toan cao*".