[vodanh]

mèo dô mấy trang này thử :

http://www.vaughns-1-pagers.com/inte...ng-factors.htm

http://www.webworkshop.net/pagerank.html

http://www.seomoz.org/article/search-ranking-factors

http://www.google.com/technology/pigeonrank.html

http://www.infotoday.com/linkup/lud1...sborough.shtml