Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
hieu xanh » chieu xanh, hieu manh, hieu nganh
tan thanh » tran thanh, tang thanh, toan thanh
thanh lap » thanh san, phan lap, thanh hai
doc hieu » toc thieu, hoc thieu, hoc hien
cua hang » cua nhung, cua cong, cua ban
cua dang » cua cong, cua ban
cong tan » cong tac, cong san, cong thanh

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - ((hanh trinh) OR (canh tranh)) ((cua hang) OR (cua dang)) cong tan thanh lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((hanh trinh) or (canh tranh)) ((cua hang) OR (cua dang)) cong tan thanh lap~".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((hanh trinh) or (canh tranh)) ((cua hang) OR (cua dang)) cong tan thanh lap*.