At Search it show me a 100 000 results, but when I try to search in site it's not showing any results. I change only alternative address. How Could I find out why it not showing any results?
I had this problem too.
You changed/added a new Address/URL? The Address of your Content Source has to be in "Default" Zone in your Alternate Access Mapping, because the Default URL in AAM is used in the Search Configuration.
Otherwise, "Search This Site" shows no results.
Check this out for more Details: http://blog.dafran.ca/post/2011/07/02/SharePoint-does-not-return-any-search-results.aspx
Edit: To add an additional URL to default zone: Central Administration > System Settings > Alternate Access Mapping > Select "Alternate Access Mapping Collection" (top right) then > "Add Internal URLs"