1 \section{Search-Engine Queries}
3 Plagiarism in the given suspicious documents should be found via the
4 ChatNoir search engine~\cite{chatnoir}.
5 In order to achieve relevant results we need to construct appropriate queries, which are then sequentially executed.% according to their priority.
7 We can divide constructed queries into three main groups according to their origin:
8 i) document keywords based, ii) intrinsic plagiarism based, and iii) headers based.