Perhaps you should try some spelling variations:
"su sach ngang cho ghi đong luc" » "su sach nang cho ghi đong luc", "su sach ngon cho ghi đong luc", "su sach quang cho ghi đong luc", "su sach ngong cho ghi đong luc", "su sach nhag cho ghi đong luc", "su sach hang cho ghi đong luc", "su sach ngang tho ghi đong luc", "su sach sang cho ghi đong luc", "so sach ngang cho ghi đong luc", "vu sach ngang cho ghi đong luc"
"su sach ngan co khi đong luc" » "su sach ngon co khi đong luc", "su sach nha co khi đong luc", "su sach han co khi đong luc", "so sach ngan co khi đong luc", "vu sach ngan co khi đong luc", "su sach nganh co khi đong luc", "su sach nhan co khi đong luc"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("su sach ngan co khi đong luc") or ("su sach ngang cho ghi đong luc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach ngan co khi đong luc") OR ("su sach ngang cho ghi đong luc")).
• Removing quotes may allow a broader search: (( su sach ngan co khi đong luc ) or ( su sach ngang cho ghi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (("su sach ngan co khi đong luc") or ("su sach ngang cho ghi đong luc"))*.