Perhaps you should try some spelling variations:
"so sach ngan y khi đong luc" » "so sach ngon y khi đong luc", "so sach nha y khi đong luc", "so sach han y khi đong luc", "so sanh ngan y khi đong luc", "bo sach ngan y khi đong luc", "co sach ngan y khi đong luc", "so sach nganh y khi đong luc", "so sach nhan y khi đong luc", "so sach nganh ky khi đong luc", "so sach ngan ly khi đong luc", "so sach ngan ky khi đong luc", "so sach ngan my khi đong luc"
"su co thanh cong hai đong luc" » "su cho thanh cong hai đong luc", "su o thanh cong hai đong luc", "su co tranh cong hai đong luc", "su co thanh cong thai đong luc", "su co thanh cong ha đong luc", "su co thanh hoang hai 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 ngan y khi đong luc") or ("su co thanh cong hai đong luc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("so sach ngan y khi đong luc") OR ("su co thanh cong hai đong luc"))*.
• Removing quotes may allow a broader search: (( so sach ngan y khi đong luc ) or ( su co thanh cong hai đong luc ))*.