I am working on a site since 8 month so my almost keyword are ranked on Yahoo or Bing search engine on the top. but there are gradually splitting and then now my keyword are rank on bing and Yahoo search engine. but my keyword are ranked on Google 3rd, 4th, and 5th position on google first page. i have do all the thinks.
                 So Please suggest me "what to do?" for getting my keyword ranking again on Bng and Yahoo's search engine.