home in on sth/sb
informal— phrasal verb with home uk/həʊm/us/hoʊm/verb 
to aim for:
The missile homed in on the ship.
to find and give a lot of attention to something or someone:
The report homed in on the weaknesses in the management structure.
Thesaurus: synonyms and related words
Aiming and aim
- aim
 - direct
 - home
 - level
 - level sth at sb
 - target
 - train
 - zero
 - zero in on sth/sb
 
You can also find related words, phrases, and synonyms in the topics:
Paying attention and being careful