why site:(domain name) shows my site's pages are not index?

I have a problem. When I fetch a URL in webmaster it shows that is on google but in sitedomain name) I set a specific period of time but there is no pages have been indexed.

what's the issue and how can I fix it?

 

When you Google just the site name (without https, www or .com) does it bring up your site?

 

there might be a difference between www & non-www.. cross-check. And still it is not indexed in Google, try to index it..

 

I search with out www just domain name then by tools tab set time for past week and there is no pages while I'm sure I index some new pages.

 

Don't want to freak you out but it's possible your site has been penalized. Did you try getting backlinks for your site recently? Or any other blackhat SEO methods?

 

yeah I try to get backlink but I had did it before and there was no problem