I use my blog for SEO contest since May 2011, but my blog can not appear on the front page of search engines, especially Google, but I have been doing SEO on my blog. Can anyone help me to optimize my blog?

This is my article for SEO Contest:
allaboutcyber.blogspot.com/2011/08/mobilkeluargaterbaikdiindonesiamobilbai.html
allaboutcyber.blogspot.com/2011/06/tabletandroidhoneycombterbaikmurahmurah.html
allaboutcyber.blogspot.com/2011/08/top1olisintetikmobil-motorindonesiatop1.html
allaboutcyber.blogspot.com/2011/08/teak123gardenfurnituremanufactindonesia.html
allaboutcyber.blogspot.com/2011/08/kerajaanhostingmasadepanhostigindonesia.html
allaboutcyber.blogspot.com/2011/08/adira-asuransikendaraanterbaikindonesia.html

Thanks for your reply