Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithms
changing optimisation » staffing optimization
passive estimation » pose estimation
modified changing » modified caging
modified passive » modified adaptive

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( modified changing optimisation algorithm ) or ( modified passive estimation algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified changing optimisation algorithm ) OR ( modified passive estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified changing optimisation algorithm ) or ( modified passive estimation algorithm ))*.