Perhaps you should try some spelling variations:
"astrophysical dusty" » "astrophysical data", "astrophysical disks", "astrophysical quest"
"astrophysical discs" » "astrophysical jets", "astrophysical black", "astrophysical data"
"astrophysical test" » "astrophysical quest", "astrophysical jet", "astrophysical jets"

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: (("astrophysical test") OR ((("astrophysical dusty") OR ("astrophysical discs")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"astrophysical test\") or (((\"astrophysical dusty\") OR (\"astrophysical discs\"))))".
• Removing quotes may allow a broader search: (( astrophysical test ) or ((( astrophysical dusty ) OR ( astrophysical discs )))).
• Adding a wildcard symbol may retrieve word variants: (("astrophysical test") or ((("astrophysical dusty") OR ("astrophysical discs"))))*.