How do you translate to English se soi?

"Se soi" is not a standard phrase in any language. It's possible it's a misspelling or a phrase from a specific dialect or context.

Could you please provide more information about where you encountered this phrase? For example:

* What language is it from?

* What was the context of the phrase?

* What did the speaker intend to convey?

With more context, I can help you find a suitable English translation.