Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
hieu xanh » chieu xanh, hieu manh, hieu nganh
hang cong » dang cong, hang nong, thanh cong
bang cong » dang cong, bang song, dung cong
doc hieu » toc thieu, hoc thieu, hoc hien
dan khan » dan khanh, dan chan, dan than
khan cap » khan ap, than cap, khoan cam

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 trang) OR (hanh trinh)) cua ((hang cong) OR (bang cong)) dan khan cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - ((hanh trang) or (hanh trinh)) cua ((hang cong) OR (bang cong)) dan khan cap~".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - ((hanh trang) or (hanh trinh)) cua ((hang cong) OR (bang cong)) dan khan cap*.