Looking on the internet deeply has found these results:

keep working on my side is the most popular phrase on the web.

keep working at my side and 10 results on the web	keep working on my side 1207 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	Sep 16, 2009 ... I get up at 6am and I come back at 7pm only to keep working on my side business. I wish I had a boyfriend in a farm in the middle of nowhere�... Sep 19, 2015 ... I'll just keep working on my side projects and learning the things I need or want to know. I'll continue to study other areas like design patterns,�... Jan 28, 2014 ... ... or I could leave my job right now, and keep working on my side gigs, maybe a bit longer, but at least in a nice environment. I chose the latter. Actually, I'm not in a hurry, so I can keep working on my side, and if one day I can upload my work to the FANN repository, everyone can get it,�...

keep working at my side and

10 results on the web

keep working on my side

1207 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Sep 16, 2009 ... I get up at 6am and I come back at 7pm only to keep working on my side business. I wish I had a boyfriend in a farm in the middle of nowhere�...
Sep 19, 2015 ... I'll just keep working on my side projects and learning the things I need or want to know. I'll continue to study other areas like design patterns,�...
Jan 28, 2014 ... ... or I could leave my job right now, and keep working on my side gigs, maybe a bit longer, but at least in a nice environment. I chose the latter.
Actually, I'm not in a hurry, so I can keep working on my side, and if one day I can upload my work to the FANN repository, everyone can get it,�...