Perhaps you should try some spelling variations:
"Earthscan based services." » "Earthscan based service.", "Earthscan basic services.", "Earthscan care services."
"Earthscan case services." » "Earthscan care services.", "Earthscan waste services.", "Earthscan use services."
"earthscan air services." » "earthscan basic services.", "earthscan water services.", "earthscan care services."

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("earthscan air services.") or ((("Earthscan case services.") OR ("Earthscan based services."))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("earthscan air services.") OR ((("Earthscan case services.") OR ("Earthscan based services.")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"earthscan air services.\") or (((\"Earthscan case services.\") OR (\"Earthscan based services.\"))))".
• Removing quotes may allow a broader search: (( earthscan air services. ) or ((( Earthscan case services. ) OR ( Earthscan based services. )))).
• Adding a wildcard symbol may retrieve word variants: (("earthscan air services.") or ((("Earthscan case services.") OR ("Earthscan based services."))))*.