An article in BusinessWeek suggests that Facebook is planning a deeper push into search. Will that be limited to improving search for the site — or will it be something more comprehensive?It’s clear that Facebook needs better internal search. Right now the search function at the top of the page is not very useful. Improving Facebook site search seems to be the first objective of an internal team, led by former Googler Lars Rasmussen, according to BusinessWeek;Searching the social network could get a lot better in the near future. About two dozen Facebook engineers, led by a ...