Should i change domain?

around 2 months ago i bought an expired domain. set up wordpress and add content, at first the index is rising (when i add around 5 content the index is around 8 in google), but a month later the index is reduced and stay at 4 in google.i wait till now (around 3 weeks) but the index stay same.



i also check "part of the article" to google, but no result found for "part of the article"

should i move to new domain?

How many content do you have now?

If still 5, I think you should add more content.

You should also check your SEO plugin. Does the configuration setting correct. Or something blocking Google bot from indexing your site.

Not necessarily, it is possible that your articles are not of good quality, and that they were later de-indexed. It is also possible that you have duplicate content. Did you write them while being inspired by other sites? About words?
Give more details so we can help you.