"practice diligently" is a correct and usable phrase in written English.
You can use this phrase when discussing the importance of working hard and gaining expertise in a certain skill. For example: "If you want to excel at playing the piano, you should practice diligently every day."
took the advantage of integrated engineering geology method to carry out specific technical research and perform practice diligently for 7 years.
That's why she decided to stay home one summer and practice diligently for a spot in a prestigious youth orchestra instead of going to camp with her two best friends.
SAN FRANCISCO, CALIFORNIA--Taking music lessons can strengthen connections between the two hemispheres of the brain in children, but only if they practice diligently, according to a study reported here 14 April at the annual meeting of the Cognitive Neuroscience Society.
Pick one or two to start and practice diligently on a daily basis.
If you'll really dedicate yourself and practice diligently, you will see a remarkable difference in your playing.
She has been practicing diligently with Ester Gonzalez.
Spacer practices diligently, but on race day he doesn't place.
Jones has made a habit of studying all the receiving assignments since he was at the University of Miami -- a coach there told him this trait would be an asset throughout his career -- and Dorris practiced diligently in Giants training camp.
The contributors to this book are both cautionary and hopeful as they offer visions of how information design can be practiced diligently and ethically, for the benefit of information consumers as well as producers.
Katsura practiced diligently, and began competing against Japanese men and beating them.
