'have minimal knowledge' is correct and usable in written English.
You can use it when referring to a lack of knowledge in a certain area or subject. For example, "He has minimal knowledge about modern technology."
In both India and Kenya, poor people often have minimal knowledge about disease and tend to delay treatments.
I craved a major change, but I have minimal knowledge about cosmetics and little interest in navigating through the thousands of products available on my own.
Patient inexperience with the diagnostic process: while patients have expertise in their own experience of symptoms, they typically have minimal knowledge about their diagnostic journey to an unknown destination.
The human movement students were expected to have minimal knowledge of EBP, as at the time of the study these students were not required to enroll or be assessed in any EBP or research training course and were therefore not exposed to any formal standardised EBP or research instruction.
Channels of information A study commissioned by UNICEF prior to the start of the education campaign showed that youth in Georgia had minimal knowledge about the preventive measures that are effective against bird flu.
Health care providers generally had minimal knowledge of alternative methods of reproduction for HIV-positive individuals, often were unaware of where patients could access safer conception services, and felt uninformed to provide answers.
Team members have minimal prior knowledge of patient histories, and patient populations are diverse in terms of demographic background, risk factors, and underlying pathology.
In this case, a single workshop may not be adequate, especially if teachers have minimal prior levels of knowledge about, or experience with, the focus of the training (Manning and Avery 2007; Moreno et al. 2015; Zaslow 2014).
The lay reviewer had minimal prior knowledge of the subject.
In our case we assume that the adversary has minimal prior knowledge as this is similar to the context of the re-identification attack on the ADE database.
This was particularly apparent in the studies where participants had not been tested for HPV and had minimal prior knowledge (Anhang et al, 2004; McCaffery et al, 2006; Fernandez et al, 2009; Marlow et al, 2009; Daley et al, 2010).
