Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
thanh tung » thanh cong
cua duong » cua dong, cua huong, tuan duong
qua duong » quan duong, qua dung, qua dong
toan cao » toan ban, toan tap
ty toan » ly toan, tap toan, huy toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu sach) or (chieu sang)) - thanh tung ((cua duong) OR (qua duong)) cong ty toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chieu sang)) - thanh tung ((cua duong) OR (qua duong)) cong ty toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (chieu sang)) - thanh tung ((cua duong) OR (qua duong)) cong ty toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chieu sang)) - thanh tung ((cua duong) OR (qua duong)) cong ty toan cao*.