'gain more knowledge' is correct and usable in written English.
You can use this phrase when you are talking about someone's efforts to increase their understanding of a subject. For example, "She has been working hard to gain more knowledge in her field of study."
She enrolled in order to gain more knowledge of the subject she was assigned to teach, she said.
There are shouts: "God is great!" "God help you gain more knowledge, our sheikh!" The camera focusses on a handsome young preacher with serious brown eyes.
After completing A-levels in business, 3D design and accounting, Mistry was keen to gain more knowledge of business, but the idea of being "tied down" to a three-year university course didn't appeal.
Not only that, this engine can help ordinary people who have a strong interest in flowers to gain more knowledge".
Field laboratories/wells to gain more knowledge about downhole conditions and test technological approaches along the entire development chain.
To gain more knowledge about this, we conducted a multivariate analysis to identify potential pre-diagnostic and complementary factors.
This allows users to complete more tasks and gain more knowledge through experience, in contrast to menu-based interfaces.
In addition, as you gain more knowledge about the commercialization process, and have a better understanding of the business world, you can improve your grant proposals.
In other words, Informatica is already being used by health care providers and by payers in order for them to gain more knowledge about patients and about treatments.
Scientific research should be aimed to gain more knowledge and derive optimal management for guiding bioenergy development and environmental protection in China and other developing countries as well.
"Being able to reconstruct the colors of feathers can help us gain more knowledge about the organisms and more responsibly reconstruct what they looked like".
