Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doanh luan » doanh nhan
hieu lang » chieu sang, hieu quang, nhieu tang
anh doanh » hanh doanh, anh danh, doanh doanh
luan phan » luan van, luan hoan
phan cong » thanh cong
cong vang » cong lang, cong quang, cong ngang
vang van » dang van, tang van, lang van
van chat » cao chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (hieu lang)) - anh doanh luan phan cong vang van chat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu lang)) - anh doanh luan phan cong vang van chat*.