Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
thanh phan » thanh pho, thanh san, thanh toan
phan dang » phan dau, phan cong, nhan dan
dang cong » dung cong
doc hieu » hoc thieu, hoc hien
cong anh » cong danh, dong anh, hong anh
anh luan » anh tuan, anh quan, anh xuan

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 (toc thieu)) xanh - dang thanh phan dang cong anh luan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) xanh - dang thanh phan dang cong anh luan van*.