Hi can any one help me how to display the relevant results first in search.apsx

when we search for a term like Red Shirt

the result page brings up all the products for Red and
all the product for shirt and
all the products for red shirt

and those results are organized in ascending order.

but i wan to display the more relevant one first and rest later.

i mean Red Shirt first
and rest should follow

can anyone help me how to do this.

thanks