Perhaps you should try some spelling variations:
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
location optimization » allocation optimization, static optimization
modified location » modified carbon
method algorithm » mom algorithm
mobile learning » machine learning
learning method » learning methods, graining methods, learning emotion

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

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