Perhaps you should try some spelling variations:
optimisation algorithm » optimization algorithms, estimation algorithm, estimation algorithms
source algorithm » our algorithm, search algorithm
df optimisation » _ optimisation, _ optimization, qoe optimization
modified df » modified _, modified adam, modified bi1
core using » care nursing

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( ((core using) OR (code using)) source algorithm ) or ( modified df optimisation algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( ((core using) OR (code using)) source algorithm ) OR ( modified df optimisation algorithm )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( ((core using) OR (code using)) source algorithm ) or ( modified df optimisation algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( ((core using) OR (code using)) source algorithm ) or ( modified df optimisation algorithm ))*.