Search for doc's on WIN7 Drive not working

Hello, I am wondering if any of you know a work around for this. I cant seem to understand why the search for the names of documents does not look in the windows bootcam drive correctly. For example I open the HDD for windows 7 and say I search for a text document called serials.txt and I search for "serials" and serials.txt" and Finder does not find.... The document is there and inside the folder located on the WIN7 Partition I am searching. I do have Paragon NTFS installed... Confused.