Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
cua trong » cua truong, cua trung, qua trong
ho chieu » theo chieu, hoc thieu, doi chieu
tung cua » trung cua, tuong cua, dung cua
toan can » toan ban, toan cao, toan cau
tan can » tan van, ban can, tac can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh tung cua trong cong ((tan can) or (toan can)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh tung cua trong cong ((tan can) OR (toan can)) cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh tung cua trong cong ((tan can) or (toan can)) cau*.