Perhaps you should try some spelling variations:
chinh doanh » kinh doanh
truong cong » trong cong, truong dong, truong long
hanh doanh » hang doanh, doanh doanh, kinh doanh
cua truong » cua trung, xuan truong, cac truong
hieu xanh » chieu xanh, hieu manh, hieu nganh
cong lang » cong vang, cong luong, cong quang
doc hieu » toc thieu, hoc thieu, hoc hien
lang van » dang van, tang van, hoang van

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 - ((hanh doanh) or (chinh doanh)) cua truong cong lang van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((hanh doanh) OR (chinh doanh)) cua truong cong lang van ban.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((hanh doanh) or (chinh doanh)) cua truong cong lang van ban*.