Self-enrichment

Self-enrichment
self-enrich

Is there a proper equivalent?

self-en·rich·ment (slfn-rchmnt)
n.
1. The act or process of developing or augmenting one's intellectual powers or spiritual resources.
2. The act or process of enriching oneself financially.

I'm refering to the first definition

"самосовершенствование" may be?

Though, the translation suggested is "self-perfection".

Отлично! Нашли :)

Babylon Russian-English
самосовершенствование (n)
n. self cultivation; self-help

Efremova (Russian Explanatory Dictionary)
самосовершенствование
самосовершенствование
ср.
Совершенствование собственных качеств.

Но слово непростое... Я сожалею :"":

"саморазвитие" will work well.

I got tons of Google hits for the phrase книги по саморазвитию (including "classics of the genre" such as «Семь навыков высокоэффективных людей» and «Как приобретать друзей и оказывать влияние на людей») so I think Shady_arc's suggestion is a winner.