Perhaps you should try some spelling variations:
"su canh tranh cuoc khi đong luc" » "su canh tranh duoc khi đong luc", "su canh tran quoc khi đong luc", "su canh trong cuoc khi đong luc", "su canh tranh cuoc khoi đong luc", "su canh tranh cuoc thi đong luc", "su canh tranh buoc khoi đong luc", "suc canh tranh cuoc khi đong luc", "su can tranh cuoc khi đong luc", "su anh tranh cuoc khi đong luc"
"su sach tranh cua khi đong luc" » "su sach doanh cua khi đong luc", "su sach manh cua khi đong luc", "so sach tranh cua khi đong luc", "vu sach tranh cua khi đong luc", "su sach tranh cua khoi đong luc", "su sach tranh cu khi đong luc", "su sach tranh cua chi 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 tranh cua khi đong luc") or ("su canh tranh cuoc khi đong luc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("su sach tranh cua khi đong luc") OR ("su canh tranh cuoc khi đong luc")).
• Removing quotes may allow a broader search: (( su sach tranh cua khi đong luc ) or ( su canh tranh cuoc khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (("su sach tranh cua khi đong luc") or ("su canh tranh cuoc khi đong luc"))*.