Perhaps you should try some spelling variations:
interactions series » interactions between
based interactions » based interaction, based interventions, based interactive
crowd sanitation » good sanitation, food sanitation, town sanitation
supply based » supply case, supplies based, supply asia
supply crowd » supply growth, supply cost, supply from

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( supply based interactions series. ) or ( supply crowd sanitation services. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( supply based interactions series. ) OR ( supply crowd sanitation services. )).
• Adding a wildcard symbol may retrieve word variants: (( supply based interactions series. ) or ( supply crowd sanitation services. ))*.