Pore over
Definition 1 of 1
Pro Tip 1/3Deep Focus
Used when someone is concentrating intensely on reading or examining something. 
The detective pored over the clues with deep focus.
Pro Tip 2/3Time Intensive
Implies spending a lot of time on the activity, not a quick glance. 
Preparing for her thesis defense, she pored over her notes late into the night.
Pro Tip 3/3Seeking Details
Suggests looking for small or hidden details not immediately obvious. 
He pored over the contract to find any fine print.