To struggle to think or remember something.
cast one's mind back
To try to remember a particular time or event; to think about somethin…
bear in mind
To hold (something) in the memory; to remember; also, to be mindful of…
drum into
To repeat something to a (person) until they accept, remember or under…
flash back
To recall or remember something; to experience a flashback.
file away
To cause oneself to remember (something); to avoid expressing a feelin…
jog someone's memory
To cause someone to remember something, suddenly; to spark a memory.