The phrase "a limited knowledge about" is correct and usable in written English.
It can be used when discussing someone's restricted understanding or awareness of a particular subject or topic.
Example: "She has a limited knowledge about the history of art, which is why she struggles to appreciate modern pieces."
Alternatives: "a restricted understanding of" or "a narrow grasp of".
Its polling shows most people have a limited knowledge about the war and its origins.
However, since users generally have a limited knowledge about their environment, we claim that cooperative behavior can provide them with the necessary information to solve the global issues.
Conversely, distributed (yet coordinated) beamforming schemes where each cell exploits the knowledge of the information data but only a limited knowledge about the channels and other transmitter weights are a more practical alternative [6].
There is a limited knowledge about the importance of aggressive salvage treatments of oligometastatic prostate cancer [ 14].
Healthcare professionals have a limited knowledge about this population and also express a desire for more information (Abdessamad et al., 2013).
Most had a limited knowledge about organ donation [ 37] and two thirds of the physicians (64%) said that they did not sufficient staff to adequately approach the issue of donation [ 37].
However, there is only a limited knowledge available about their probable biological functions.
There are studies from different parts of Saudi Arabia demonstrating that a limited knowledge and awareness about vitamin D could be a potential reason for vitamin D deficiency among female students [ 14, 15].
This is already common knowledge to many Americans, but Oliver's program on April 5th, made one thing obvious to viewers, and that is we have a very limited knowledge about the Internet.
Global identification of promoter motifs in S. meliloti was hitherto limited due to limited knowledge about TSS of individual genes.
However, those strategies are still not effective enough and have so far achieved limited success due to limited knowledge about how the resistance mechanisms are triggered in bacteria upon antibiotic drug treatment [ 2].
