Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, nhieu tang
doanh luan » doanh nhan
hieu lang » hieu quang, nhieu tang, hieu van
anh doanh » hanh doanh, anh danh, doanh doanh
luan phan » luan van, luan hoan
phan cong » thanh cong
cong can » cong san, cong tan, cong dan
can ban » van ban, toan ban
ban can » ban dan, ban hang, ban hanh

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 sang) or (hieu lang)) - anh doanh luan phan cong can ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (hieu lang)) - anh doanh luan phan cong can ban can*.