Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh doanh » hang doanh, chinh doanh, doanh doanh
doi chieu » doc hieu, doi chi, ho chieu
hang cong » dang cong, hang nong, bang cong
doanh va » doan va, doanh tai, doanh cua
cong anh » cong danh, dong anh, hong anh
tuan ban » tuan bang, toan ban, luan ban
luan san » luan van, luan hoan, luan phan
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sang - hanh doanh va hang cong anh ((tuan ban) or (luan san))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh doanh va hang cong anh ((tuan ban) OR (luan san)).
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh doanh va hang cong anh ((tuan ban) or (luan san))*.