Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
df optimisation » _ optimisation, _ optimization, qoe optimization
a algorithm » _ algorithm, _ algorithms, adam algorithm
modified df » modified _, modified adam, modified bi1
learning a » learning _

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

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