Perhaps you should try some spelling variations:
"su sach thanh cong khi đong luc" » "su sach tham cong khi đong luc", "su danh thanh cong khi đong luc", "su sach danh cong khi đong luc", "su sach thanh cong thai đong luc", "su sach thanh khong khi đong luc", "su sach thanh co khi đong luc", "so sach thanh cong khi đong luc", "vu sach thanh cong khi đong luc"
"su sach tranh my khi đong luc" » "su canh tranh my khi đong luc", "su sach trinh my khi đong luc", "su sach tran sy khi đong luc", "su sach anh my khi đong luc", "so sach tranh my khi đong luc", "vu sach tranh my khi đong luc", "su sach tranh ly khi đong luc", "su sach tranh ky khi đong luc", "su sach tranh my chi 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: (("su sach thanh cong khi đong luc") or ("su sach tranh my khi đong luc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach thanh cong khi đong luc") OR ("su sach tranh my khi đong luc"))*.
• Removing quotes may allow a broader search: (( su sach thanh cong khi đong luc ) or ( su sach tranh my khi đong luc ))*.