Perhaps you should try some spelling variations:
"so sach nganh y khi đong luc" » "so sach ngan y khi đong luc", "so sach tranh y khi đong luc", "so cac nganh y khi đong luc", "so sanh nganh y khi đong luc", "bo sach nganh y khi đong luc", "co sach nganh y khi đong luc", "so sach nganh ly khi đong luc", "so sach nganh ky khi đong luc", "so sach nganh my khi đong luc"
"su can nguoi co khi đong luc" » "su con nguoi co khi đong luc", "su ca nguoi co khi đong luc", "su ban nguoi co khi đong luc", "su can nguoi do khi đong luc", "su can nguoi dao khi đong luc", "su can nguoi moi khi đong luc", "su van nguoi co khi đong luc", "su cao nguoi co khi đong luc", "tu can nguoi co khi đong luc"

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

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