Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
dong cong » duong cong, dung cong, dang cong
doc hieu » toc thieu, hoc thieu, hoc hien
chao chu » cho chu, cua chu, cao cho
cua dong » chua dong, cua cong, cua dang
van than » van thanh, van thang, van tuan
van hang » van khang, van hoang, van thang

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) or (chao chu)) xanh - hanh tranh cua dong cong ((van than) or (van hang)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (chao chu)) xanh - hanh tranh cua dong cong ((van than) OR (van hang)) cao.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (chao chu)) xanh - hanh tranh cua dong cong ((van than) or (van hang)) cao*.