You searched for: “mnemonic techniques
mnemonic technique (s) (noun), mnemonic techniques
A reference to refreshing, improving, assisting, or developing the memory, especially by artificial aids: The mnemonic technique system of precepts and rules is intended to aid or to upgrade and polish the memory.

Pointing to a page about a mnemonic words Mnemonics: Spelling "Seed" Words (-cede, -ceed, and -sede).