Perhaps you should try some spelling variations:
duong trong » dung trong
thien thanh » tien thanh, thi thanh, hien hanh
duoc thien » duc thien, duoc dien, cuoc chien
minh trang » tinh trang, minh hoang, minh tuan
trong doan » trong doanh, trong dan, trong hoan
cua duong » cua dong, cua huong, qua duong
doan van » doan va, hoang 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 thien thanh - ((minh trang) or (canh tranh)) cua duong trong doan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: duoc thien thanh - ((minh trang) OR (canh tranh)) cua duong trong doan van ban.
• Adding a wildcard symbol may retrieve word variants: duoc thien thanh - ((minh trang) or (canh tranh)) cua duong trong doan van ban*.