Perhaps you should try some spelling variations:
earthscan airport » earthscan expert
earthscan export » earthscan expert
"Earthscan airport service." » "Earthscan airport services.", "Earthscan transport service.", "Earthscan support services."
"Earthscan export service." » "Earthscan export services.", "Earthscan exports services.", "Earthscan support service."

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 export service.") OR ("Earthscan airport service."))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Earthscan export service.\") OR (\"Earthscan airport service.\"))".
• Removing quotes may allow a broader search: (( Earthscan export service. ) OR ( Earthscan airport service. )).
• Adding a wildcard symbol may retrieve word variants: (("Earthscan export service.") OR ("Earthscan airport service."))*.