Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
thong qua » thong quan, thong cua
trong van » trong cac
van thanh » ban thanh, van tuan
thanh cap » thanh lap, hanh cap, than cap
doc hieu » toc thieu, hoc thieu, hoc hien
thong tu » phong tuc, thong tin, thong ke

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 ((((thong qua) OR (duong qua))) or (thong tu)) dung trong van thanh cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh ((((thong qua) OR (duong qua))) OR (thong tu)) dung trong van thanh cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - thanh ((((thong qua) OR (duong qua))) or (thong tu)) dung trong van thanh cap".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh ((((thong qua) OR (duong qua))) or (thong tu)) dung trong van thanh cap*.