Perhaps you should try some spelling variations:
"thuc hanh trinh cong khi đong luc" » "thuc canh tranh cong khi đong luc", "thuc hanh chinh cong khi đong luc", "thuc hanh trinh dung khi đong luc", "thuc hanh trinh cong thai đong luc", "thuc hanh trinh khong khi đong luc", "thuc hanh trinh cong ha đong luc", "thu hanh trinh cong khi đong luc"
"tu can tranh co khi đong luc" » "tu canh tranh co khi đong luc", "tu tan tran co khi đong luc", "tu van ranh co khi đong luc", "tu can trinh co khi đong luc", "tu can tranh o khi đong luc", "tu can tranh cuoc khi đong luc", "tu ban tranh co khi đong luc", "tu cac tranh co khi đong luc", "thu canh tranh 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: (("thuc hanh trinh cong khi đong luc") or ("tu can tranh co khi đong luc"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("thuc hanh trinh cong khi đong luc") OR ("tu can tranh co khi đong luc")).
• Removing quotes may allow a broader search: (( thuc hanh trinh cong khi đong luc ) or ( tu can tranh co khi đong luc )).
• Adding a wildcard symbol may retrieve word variants: (("thuc hanh trinh cong khi đong luc") or ("tu can tranh co khi đong luc"))*.