branch of knowledge
field of knowledge

At least not unless the problem lay within his own field of knowledge.

Information such as political, economic, scientific, cultural and other fields of knowledge.

The narrower their field of knowledge the more likely they are to think so.

I'll try to pass it on as best I can, though this is not my field of knowledge.

In this way, the officials spread all over the country and started to teach their own field of knowledge as private teachers.

There seemed to be no field of human knowledge in which he did not speak as an expert.

There are many fields of knowledge in which others know more than you.

Therefore, both the human and the machine would be specialists in some field of knowledge.

Thus, the same concept can appear in different fields of knowledge.

In any field of knowledge different views are always at play.