To focus closely on something
Zero in on
To compare prices for or quality of an item from different sources
Shop around
To consider
Think (sth) over
To ask many people the same question
Ask around
To find the answer or to understand something
Figure (sth) out
Examine or discuss in detail
Go over
To find something unexpectedly
Come across
To return a phone call
Call back
To speak more slowly
Slow down
To type on a computer or to create a complete version
Write up
Mention quickly
Run through
To visit briefly or without making an appointment first
Dropby
To discuss something with a person for his or her opinion
Run by/past