The right thing is heuristic etymology, missed two tildes. The etymology of heuristics is the same as Eureka, (comes from the Greek euriskein) means find, find, find, belong.
See heuristic.
It seems that two unrelated words joined. On the one hand, it is said that a form without scientific rigor to seek solutions to problems is heuristic. On the other hand, etymology is the investigation of the origin of a Word