Search with in search by views module

Hi all;

I created a Advanced search system for my web site, using views module. I used exposed filters. Once I pass some argument as a key word it gives me correct result. but In my second time, if I use different key word , That result should be filtered by previous result. let me give example,

1st time -> If I say "heart" as my key word my result will be "heart" , "heart patient" , "heart attack" , like this

then my 2nd time -> If I say "attack" I should get only "heart attack" but my data base may be have "bomb attack" , "Tiger attack" or something else. but in this case I should filter only "heart attack". because In my first time I search "heart"

In my current system I need to add this functionality. How I do that..? Is there any appropriate module or something available.

Please my friends help me to get this done....

Thank you all.