In general, the answer is no - smell does not enhance memory.
But you are onto something with the proximity of the olfactory cortex to the limbic system: You are not the first to have noticed the special connection that smell might have with emotion and memory. This idea is called the Proust Effect:
The best known example of the power of smell to evoke ...
The term used for something nice one says to somebody, often for positive psychological effect, is called a Compliment.
One can also use Flattery (https://en.wiktionary.org/wiki/flattery) or Praise (https://en.wiktionary.org/wiki/praise) or Commendation (https://...