Perhaps you should try some spelling variations:
"complex 3d simulation from" » "complex 3d simulators from", "complex 3d simulation tools", "complex _ simulation from", "complex mri simulation from", "complex via simulation from"
"complex 3d simulation or a simulation from" » "complex _ simulation or a simulation from", "complex mri simulation or a simulation from", "complex via simulation or a simulation from", "complex 3d simulation or _ simulation from"

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: (("complex ((3d simulation) or (a simulation)) from") or ("complex 3d simulation from"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("complex ((3d simulation) or (a simulation)) from") OR ("complex 3d simulation from")).
• Removing quotes may allow a broader search: (( complex ((3d simulation) or (a simulation)) from ) or ( complex 3d simulation from )).
• Adding a wildcard symbol may retrieve word variants: (("complex ((3d simulation) or (a simulation)) from") or ("complex 3d simulation from"))*.