Plagiarism checker software is handy tool but it has to be officially approved by your home institution. Currently we have none officially but we get by using our own tips and tricks using our own experience and 'mr.google'
Adnan Bujak, same here. However, I have recently some issues.
I have submited a paper to one journal. I received the report of the plagiarism tcheck whitch exceed the rejection rate. unfortunatly, this repport highlights the "T." of my name, all the references (rewriten under the form required by the journal" and some other indevidual words as "the""is" "Figure 2" and so on