So a day ago, my search result on google was 239 and I checked today it is 250 results. It's pretty good and I'm happy but I'm still wondering how it increased. I did write 2 articles but that was a few day's ago.
It could be the new articles. It can take a little time for things to be indexed. It can also take some time for new articles to generate more traffic. What ever you did though, congrats.
What feedback are you getting in google's webmaster tools? Have they recently picked up your xml sitemap?
I haven't really used google's webmaster tools. I have already submitted the sitemap a long time ago.
It might pay to go and take a look occassionally - especially if you are reviewing the number of pages indexed so carefully that an increase of 11 makes your day