I want to know the theories for addressing challenges encountered in the implementation of HRMIS/HCMIS/HRIS in Tanzania. Are they flexible in Tanzanian context?
When you say "theories" are you talking about theoretical frameworks? There are many. For example, Illusion of Control (trying to control operations through IT usage), Institutional Theory (the institutions of management or hierarchies), Attribution Theory, Goal Setting Theory, the list goes on.
If you are doing a comparative analysis you might consider theories related to cultural distance (like the CAGE framework).