Perhaps you should try some spelling variations:
"element method algorithm" » "element mould algorithm" (Expand Search), "elements method algorithm" (Expand Search)
"pooled using algorithm" » "pooled cosine algorithm" (Expand Search), "problem using algorithm" (Expand Search), "tool using algorithm" (Expand Search), "tools using algorithm" (Expand Search)
"data tracking algorithm" » "radar tracking 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: (("element method algorithm") OR ((("data tracking algorithm") OR ("pooled using algorithm"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"element method algorithm\") OR (((\"data tracking algorithm\") OR (\"pooled using algorithm\"))))".
• Removing quotes may allow a broader search: (( element method algorithm ) OR ((( data tracking algorithm ) OR ( pooled using algorithm )))).
• Adding a wildcard symbol may retrieve word variants: (("element method algorithm") OR ((("data tracking algorithm") OR ("pooled using algorithm"))))*.