Perhaps you should try some spelling variations:
"very sparse telescopes" » "very space telescopes", "very space telescope", "very state telescopes"
"very large telescopes" » "very large telescope", "very space telescopes"
"very radio telescopes" » "very radio telescope", "very rapid telescopes", "ary radio telescopes", "nearby radio telescopes"
"very star telescopes" » "very solar telescopes", "very state telescopes", "very nexstar telescopes", "very smart telescopes", "very scare telescopes", "very scart telescopes"

Try widening your search to All Fields.

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("very large telescopes") OR ("very radio telescopes"))) OR ((("very sparse telescopes") OR ("very star telescopes")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"very large telescopes\") OR (\"very radio telescopes\"))) or (((\"very sparse telescopes\") or (\"very star telescopes\"))))".
• Removing quotes may allow a broader search: (((( very large telescopes ) OR ( very radio telescopes ))) or ((( very sparse telescopes ) or ( very star telescopes )))).
• Adding a wildcard symbol may retrieve word variants: (((("very large telescopes") OR ("very radio telescopes"))) or ((("very sparse telescopes") or ("very star telescopes"))))*.