Perhaps you should try some spelling variations:
"earthscan export price." » "earthscan expert price.", "earthscan export prices.", "earthscan import prices."
"Earthscan export service." » "Earthscan export services.", "Earthscan exports services.", "Earthscan airport service."
earthscan port » earthscan forest, earthscan expert, earthscan food
"Earthscan port services." » "Earthscan support 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 export service.") OR ("Earthscan port services."))) or ("earthscan export price."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("Earthscan export service.") OR ("Earthscan port services."))) OR ("earthscan export price.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Earthscan export service.\") OR (\"Earthscan port services.\"))) or (\"earthscan export price.\"))".
• Removing quotes may allow a broader search: (((( Earthscan export service. ) OR ( Earthscan port services. ))) or ( earthscan export price. )).
• Adding a wildcard symbol may retrieve word variants: (((("Earthscan export service.") OR ("Earthscan port services."))) or ("earthscan export price."))*.