I have learned from this forum and can summarize that the modern way to get more hits and indexed quicklier is to write fresh articles on your blog and submit them to social bookmarking sites.
I tried them for a month but I do not see many hits from my CP stats.
I agreed that my sites got closer for some keywords when searching them on Google. But Yahoo, it is too hard and have not changed.
Any idea is appreciated.
Thanks for reading.
Have a nice day!