"lack of sufficient knowledge" is correct and can be used in written English.
You can use this phrase when you want to explain that someone does not have enough knowledge to do something. For example, "I couldn't complete the assignment because of a lack of sufficient knowledge."
He added: "It was not the lack of sufficient knowledge about history and religion which led to the Iraqi debacle, but the lack of restraint among politicians who had all the relevant information at their fingertips".
As Jonathan Eyal, of the Royal United Services Institute, puts it: "It was not the lack of sufficient knowledge about history and religion which led to the Iraqi debacle, but the lack of restraint among politicians who had all the relevant information at their fingertips".
With lack of sufficient knowledge of drill string stability region may be used pipes with more resistance for more safety.
A lack of sufficient knowledge regarding the behaviour of stimuli-responsive polymers to biological stimuli hinders the potential use of responsive polymers as biomaterials and medical devices.
Part of this difficulty is due to a lack of sufficient knowledge base (e.g., the understanding of core scientific concepts and principles), but the knowledge base itself cannot guarantee for making a proper scientific explanation.
Due to different personal experiences and/or lack of sufficient knowledge and information, decision-makers who participate in the QFD analysis process tend to provide their opinions by using different types and multi-granularity linguistic information, which are inherently vague and imprecise.
Up to now, we have hardly made a comprehensive assessment of human well-being from ecosystem services and biodiversity yet, owing to the lacks of sufficient knowledge and appropriate technique [10], [17].
Or maybe it's a lack of a sufficient knowledge base.
Designers often have difficulty in fulfilling creative conceptual designs of multi-disciplinary systems due to the lack of sufficient multi-disciplinary knowledge.
The development of nuclear transfer techniques in mammals has been delayed due to the lack of sufficient techniques and knowledge to manipulate mammalian oocytes, zygotes, and embryos.
Judges decide based on their technical consultant's point of view, many of whom lack sufficient knowledge and skill for detecting medical errors.
