Do you have any ideal where can I check whether my contents are being duplicated? If yes, please let me know where and how to check. Thanks
yeah most use copyscape.com but they restricted the way it can be used a while back to get paid users and stop misuse. do a google search or look at this dp thread to find out to get around having to pay to use copyscape: http://forums.digitalpoint.com/showthread.php?t=1202826 just dont forget to delete the article after testing for uniqueness if you use that method - so the article will not get indexed by google first before you post it at your desired web location, if you dont it will not remain unique. The other popular choice is a software called dupefreepro but think there is a fee to use it???
so many software available for this you can use copyscape which is paid or you can use http://www.plagiarismdetect.com/member2.php
The easiest method, which is free but implies some work, is to use the google search. Take a whole phrase out of your article and search it in google with quotation marks... Preferably, find a phrase which is important within the article: a statement, a conclusion, or a phrase that contains a lot of keywords. I usually do two checks per every 500 words article- that should be enough!