Microsoft 's share of the U.S. search market increased slightly in July, at the same time as Google and Yahoo faced slight declines.Among the 13.6 billion U.S. searches which was conducted in July,nearly 64.7% searches were performed through Google which is a.3 percent reduction from June,according to the conclusions drawn from Comscore.Similar to Google,Yahoo too served around 19.3% ,which also reveals a .3 percent decline from June.On the other hand , Microsoft Bing's search share improved by half of a percentage point in July.Its increase is one of the main factors for most of what Google and Yahoo have lost. Microsoft sites accounted for around 8.9% of U.S. searches last month. ComScore's search results however does'nt take account of searches associated to mapping, local directory, and user-generated video sites.