Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
cuc phuong » cac phuong, cua phuong, chuc thuong
cuu phuong » cac phuong, thu phuong
thong den » thong dien, thong dan, tuong den
ho chieu » theo chieu, hoc thieu, doi chieu
den toan » dien toan, dan toan, den tran
toan cao » toan ban, toan tap

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh tung ((cuc phuong) OR (cuu phuong)) thong den toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh tung ((cuc phuong) OR (cuu phuong)) thong den toan cao*.