Perhaps you should try some spelling variations:
dong thanh » truong thanh
thanh phan » thanh pho, thanh san, thanh toan
hoc chiet » hoc thiet, hoc nhiet, hoc hien
hoc thieu » toc thieu, hoc hien
hanh tran » hanh trang, thanh tran, hanh tram
nang dong » nang song, lang dong, nang luong
tran van » luan van
van nang » van quang, van ban, van dong
phan ban » phan banh, phan van, phan ba

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chiet) or (hoc thieu)) tach - hanh tran van nang dong thanh phan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chiet) OR (hoc thieu)) tach - hanh tran van nang dong thanh phan ban*.