I have a spreadsheet which is filled automatically from data in Microsoft Sharepoint. Unfortunately this data fills my location column as follows: IND;# ENG ;# USA if for exampl
It's not possible as you have the question written. A drop down list created by data validation can only display a single result. If you chose 'IND' and wanted to show results for say 'IND' and 'IND, ENG' you would need to use something other than a drop down list or you need to do additional filtering based on the value selected down stream in your code/logic.
I'd say your best bet is to use VBA. This can be transparent from the user. When a user selects a value in the drop down list, vba can sort and filter the remaining drop down list based on what was selected (aka dependent drop downs)