Perhaps you should try some spelling variations:
"based mapping algorithm" » "based making algorithm" (Expand Search), "based mining algorithm" (Expand Search), "based learning algorithm" (Expand Search), "based machine algorithm" (Expand Search)
"data using algorithms" » "data pacing algorithms" (Expand Search), "data nine algorithms" (Expand Search), "data sorting algorithms" (Expand Search)
"relevant data algorithm" » "relevant data algorithms" (Expand Search), "relevant update algorithm" (Expand Search), "relevant atlas algorithm" (Expand Search)

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: (((("based mapping algorithm") OR ("data using algorithms"))) OR ("relevant data algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"based mapping algorithm\") OR (\"data using algorithms\"))) OR (\"relevant data algorithm\"))".
• Removing quotes may allow a broader search: (((( based mapping algorithm ) OR ( data using algorithms ))) OR ( relevant data algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("based mapping algorithm") OR ("data using algorithms"))) OR ("relevant data algorithm"))*.