Perhaps you should try some spelling variations:
hanh trang » thanh trung, hanh trinh, minh trang
duoc dien » duoc lieu
dien dan » hien dai, vien dai, gian dan
han cong » phan cong, hang cong, hanh cong
cong tan » cong tac, cong san, cong thanh
cap han » cap phan, cap can, cap hay
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: duoc dien dan - ((hanh trang) or (canh tranh)) cap han cong tan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: duoc dien dan - ((hanh trang) OR (canh tranh)) cap han cong tan van ban.
• Adding a wildcard symbol may retrieve word variants: duoc dien dan - ((hanh trang) or (canh tranh)) cap han cong tan van ban*.