Perhaps you should try some spelling variations:
hanh doanh » hang doanh, chinh doanh, doanh doanh
chieu sang » chieu sach, chieu xanh, nhieu tang
doanh luan » doanh nhan
hieu lang » hieu quang, nhieu tang, hieu van
luan hang » luan nang, luan han, luan hung
hang nong » thang long, han tong
nong tac » cong tac, dong tac, nong tan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((hieu lang) OR (chieu sang)) - hanh doanh luan hang nong tac ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu lang) OR (chieu sang)) - hanh doanh luan hang nong tac ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) OR (chieu sang)) - hanh doanh luan hang nong tac ((toan cau) or (toan tap))".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) OR (chieu sang)) - hanh doanh luan hang nong tac ((toan cau) or (toan tap))*.