Perhaps you should try some spelling variations:
"element mapping algorithm" » "element sampling algorithm" (Expand Search), "element matching algorithm" (Expand Search), "element mining algorithm" (Expand Search), "elemental mapping algorithm" (Expand Search), "element modeling algorithm" (Expand Search)
"present five algorithms" » "present four algorithms" (Expand Search), "present based algorithms" (Expand Search), "present three algorithms" (Expand Search), "present free algorithms" (Expand Search), "present novel algorithms" (Expand Search), "present high algorithms" (Expand Search)
"present forest algorithm" » "present free algorithm" (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("present forest algorithm") OR ("present five algorithms"))) OR ("element mapping algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"present forest algorithm\") OR (\"present five algorithms\"))) OR (\"element mapping algorithm\"))".
• Removing quotes may allow a broader search: (((( present forest algorithm ) OR ( present five algorithms ))) OR ( element mapping algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("present forest algorithm") OR ("present five algorithms"))) OR ("element mapping algorithm"))*.