Perhaps you should try some spelling variations:
luong quang » luong quan, dung quang
thieu sach » thien hach, hieu cach, theo sach
chieu sach » chinh sach, chiet tach, chieu sang
canh doanh » hanh doanh, chinh doanh, doanh doanh
doanh chua » doanh cua, doanh chu, doanh chung
cong quang » thong quang, duong quang, dang quang
chua bang » chu bang, chua nang, chua xang
tuan cau » toan cau, quan cau, tuan cu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu sach) or (chieu sach)) - canh doanh chua bang ((cong quang) OR (luong quang)) tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sach) OR (chieu sach)) - canh doanh chua bang ((cong quang) OR (luong quang)) tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sach) or (chieu sach)) - canh doanh chua bang ((cong quang) OR (luong quang)) tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sach) or (chieu sach)) - canh doanh chua bang ((cong quang) OR (luong quang)) tuan cau*.