Perhaps you should try some spelling variations:
hanh trinh » hanh chinh
dong chung » dung chung, cong chung, dong hung
hien sang » hien trang, khien bang, chieu sang
chung han » chung nhan, chung than, chuong han
cua dong » chua dong, cua cong, cua dang
han than » khan than, phan than, ban than
than man » than ma, thanh san, tran manh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sang - ((hanh trinh) or (canh tranh)) cua dong chung han than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - ((hanh trinh) OR (canh tranh)) cua dong chung han than man.
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - ((hanh trinh) or (canh tranh)) cua dong chung han than man*.