I have been searching the internet for a unique, powerful plagiarism checker, till I found

Plagramme has the following Unique Features:

 

• It searches against big database, with a free check option.
• It is a multilingual plagiarism detector, which has a unique Online editor.
• It gives a sophisticated plagiarism risk score, and it highlights the plagiarized paragraphs to help detection, editing and correction of manuscript.

Give it a try, I am sure you will be amazed.