Perhaps you should try some spelling variations:
functions computation » function computation, functions composition, function composition
brain segmentation » motion segmentation, based segmentation, fast segmentation
method discursive » methods dispersive, methods discourse
discursive a » discursive _, discursive de, discursive 2.3
a agent » 2 agent, 5 agent, 8 agent

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((functions computation) or (brain segmentation)) method discursive a agent~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((functions computation) OR (brain segmentation)) method discursive a agent.
• Adding a wildcard symbol may retrieve word variants: ((functions computation) or (brain segmentation)) method discursive a agent*.