ORIGINAL:
For detailed explanations of individual services, see their respective documentation sets.
BETTER:
For a detailed explanation of an individual service, see its respective documentation set.
EXPLANATION:
Using the singular “service” instead of “services” makes the sentence more accurate. Read literally, the sentence implies that for each individual service there multiple detailed explanations. While this scenario is possible, it is more likely, and in fact the case of documentation where this sentence was taken from, that there is a singular explanation provided for each service.