I heard "Harmless", "Idiot" and these songs are not b-sides and not album songs and I just don't know how can I call these songs.Could please someone tell me another coldplay rare songs, nor b-sides nor album songs?Create the list?

There's the whole list in the multimedia section, or just click "tracksearch" at the top of the coldplaying homepage.

Yeah but there are only lyrics, does somone know how did these songs come?

Well songs like Idiot, Moses, Ladder to the sun and pour me were only ever played live, but not properly recorded in studio. A ghost, was from a one time appearance on a morning radio station, and armless appears to have been recorded in studio, but was given up on and forgotten until someone sent it out later on.

Thank you