Grep : find patterns in text file
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I have to find the following patterns in  a text file  

    \xc2d 
    d\xa0 
    \xe7 
    \xc3\ufffdd 
    \xc3\ufffdd 
    \xc2\xa0 
    \xc3\xa7 
    \xa0\xa0 

I start with finding `\x` occurrences and do this  

     grep "\\x" *.log | more  

and nothing returns, is this query correct?