Perhaps you should try some spelling variations:
orientational control » organizational control, organisational control, operational control
orientation control » orientated control, documentation control, presentation controls
definition fret » definition from, definition pre, definition format
fret imaging » pet imaging, breast imaging, chest imaging

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

• Performing a fuzzy search may retrieve terms with similar spellings: information ((orientation control) or (orientational control)) definition fret imaging~.
• If you are trying to use Boolean operators, they must be ALL CAPS: information ((orientation control) OR (orientational control)) definition fret imaging.
• Adding a wildcard symbol may retrieve word variants: information ((orientation control) or (orientational control)) definition fret imaging*.