Perhaps you should try some spelling variations:
"modified allocation optimisation algorithmss" » "modified allocation optimisation algorithm", "modified allocation optimization algorithms", "modified allocation estimation algorithms", "modified allocation optimization algorithmss"
"modified lighting estimation algorithm" » "modified caging estimation algorithm"

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: (("modified lighting estimation algorithm") or ("modified allocation optimisation algorithmss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified lighting estimation algorithm") OR ("modified allocation optimisation algorithmss")).
• Removing quotes may allow a broader search: (( modified lighting estimation algorithm ) or ( modified allocation optimisation algorithmss )).
• Adding a wildcard symbol may retrieve word variants: (("modified lighting estimation algorithm") or ("modified allocation optimisation algorithmss"))*.