Perhaps you should try some spelling variations:
"palm oil information service" » "palm oil information services", "palm oil information security", "palm soil information service", "palm itil information service", "palm model information service"
"senegal social information series" » "senegal social innovation series", "senegal social transformation series", "senegal digital information series", "senegal social information services", "senegal social informatics series", "senegal social information sources", "bengal social information series", "general social information series", "senegalese social information series"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"palm oil information service\") OR (\"senegal social information series\"))~".
• Removing quotes may allow a broader search: (( palm oil information service ) OR ( senegal social information series ))~.
• Adding a wildcard symbol may retrieve word variants: (("palm oil information service") OR ("senegal social information series"))*.