Here is AdSense for Content, AdSense for Search and Referrals in the section of google adsense. I have already putted on my blog 3 adsense. After that can I add Adsense for search and Refferrals also?
yes, off course you can - Up to three ad units may be displayed on each page. - A maximum of two Google AdSense for search boxes may be placed on a page. - Up to three link units may also be placed on each page. - Up to three referral units may be displayed on a page, in addition to the ad units, search boxes, and link units specified above.