Perhaps you should try some spelling variations:
"modified objective optimizer algorithms" » "modified objective optimized algorithms", "modified objective optimized algorithm", "modified objective optimization algorithms", "modified objective optimal algorithms"
"mobile learning method algorithm" » "mobile learning mom algorithm", "machine learning method algorithm", "mobile learning methods algorithm", "mobile graining methods algorithm", "mobile learning emotion algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"mobile learning method algorithm\") OR (\"modified objective optimizer algorithms\"))~".
• Removing quotes may allow a broader search: (( mobile learning method algorithm ) OR ( modified objective optimizer algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("mobile learning method algorithm") OR ("modified objective optimizer algorithms"))*.