I have some relatively new blogs. What I seem to notice is that I can do a search for a phrase relating to my blog and get top 5 results, then I can perform another 2 minutes later and it will be either nowhere to be seen or on the next page or something. Is this because they are new?
It's called Google dance and it happens a lot with new sites. You have nothing to worry about, just keep updating your blogs regally and building links. Established sites are much more stable, but you will have to wait a few months
i think it's called as google dance (gd) . you must increase your backlink to your site with related keyword