Perhaps you should try some spelling variations:
spatial optimization » spatial organization (Expand Search), swarm optimization (Expand Search), global optimization (Expand Search)
path optimization » swarm optimization (Expand Search), whale optimization (Expand Search), based optimization (Expand Search)
akt spatial » make spatial (Expand Search), a spatial (Expand Search), st spatial (Expand Search)
linac based » lines based (Expand Search)
based path » based pa (Expand Search), based pathway (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( binary akt spatial optimization algorithm ) OR ( linac based path optimization algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( binary akt spatial optimization algorithm ) OR ( linac based path optimization algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( binary akt spatial optimization algorithm ) OR ( linac based path optimization algorithm ))*.