Perhaps you should try some spelling variations:
earthscan expert » earthscan forest
"Earthscan export services." » "Earthscan exports services.", "Earthscan export service.", "Earthscan port services."
"Earthscan expert series." » "Earthscan express series.", "Earthscan report series.", "Earthscan expert survey."
"earthscan paper series." » "earthscan cover series."

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 expert series.") OR ("Earthscan export services."))) or ("earthscan paper series."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("Earthscan expert series.") OR ("Earthscan export services."))) OR ("earthscan paper series.")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Earthscan expert series.\") OR (\"Earthscan export services.\"))) or (\"earthscan paper series.\"))".
• Removing quotes may allow a broader search: (((( Earthscan expert series. ) OR ( Earthscan export services. ))) or ( earthscan paper series. )).
• Adding a wildcard symbol may retrieve word variants: (((("Earthscan expert series.") OR ("Earthscan export services."))) or ("earthscan paper series."))*.