A complete search of the internet has found these results:
keep up the good work is the most popular phrase on the web.
"keep up the good work" is an idiom meaning "keep doing a good job." "keep up the good works" could have a similar meaning, referring to positive actions someone is taking to help another person or group.
3,966,882 results on the web
He patted me on the back and said, “Keep up the good work!”
Whenever one of my employees does a really good job on a project, I tell them to keep up the good work.
My boss told me to keep up the good work.
The poster is looking great so far; keep up the good work!
My teacher gave my essay back and said, “Keep up the good work.”
It’s always reassuring when someone tells you to keep up the good work.
To boost employee motivation, the manager told everyone that if they keep up the good work, they will get bonuses.
I will try my hardest to keep up the good work.
We've been getting really good feedback lately, so let's try to keep up the good work.
Although times are tough right now, my manager really wants me to keep up the good work.
289,774 results on the web
We see that you have been volunteering much of your time to helping children in Africa. Please keep up your good works!
We keep up the good works of charity with your generous donations.
Can you please keep doing good works this year? It makes me respect this company more.
He kept up the good works throughout his stint at the university in the impoverished town.
Keeping up the good works means not stopping your efforts to help people, even when you are tired and burnt out.
Keep up the good works and you can start a non-profit organization.