"gain more understanding" is correct and can be used in written English.
It can be used to refer to someone learning more about a certain topic or concept. For example: "We attended the seminar in order to gain more understanding of the new regulations."
Theoretical sampling helped to elaborate and refine the emerging categories and gain more understanding about the processes all students employed.
To gain more understanding about micro structural properties of the prepared coral-loaded roll scaffold and diffusion state of the seeded cells histological study was done.
To gain more understanding of the nature of these bugs, we review the reported software failures that have impacted the health, safety, and welfare of the public.
In order to gain more understanding on issue, this study aims to examine the effect of gender on student's scientific reasoning ability in a context of Thailand.
Experimental investigations are conducted in order to gain more understanding of the underlying processes and confirm the reliability of the geometry with respect to the success rate of the deflagration-to-detonation transition (DDT).
In this work, the effects of different production parameters such as well-completion location, well spacing, and production schedule on the production efficiency are investigated to gain more understanding about gas production from class 1 gas-hydrate reservoirs.
But since the health concerns first emerged, scientists have gained more understanding of the role of nitrate and nitrite in human health and have discovered the preservatives also have benefits, for example, in the healthy functioning of the cardiovascular and immune systems.
The investigation of these features will be the subject of future work that aims at gaining more understanding about the different characteristics of newborn EEG seizures.
"Around 2005 is when we started to see it being used as its own identity, thus gaining more understanding that aromanticism is not the same as asexuality".
The preceptors perceived that they had gained more understanding of how they could use reflection as an educational tool working with the students.
