Perhaps you should try some spelling variations:
"element model algorithm" » "element mould algorithm" (Expand Search), "elements model algorithm" (Expand Search)
"patients samples algorithm" » "patients sample algorithm" (Expand Search)
"sediment anbs algorithm" » "sediment abs algorithm" (Expand Search), "sediment anas algorithm" (Expand Search), "sediment ans 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: (((("patients samples algorithm") OR ("sediment anbs algorithm"))) OR ("element model algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"patients samples algorithm\") OR (\"sediment anbs algorithm\"))) OR (\"element model algorithm\"))".
• Removing quotes may allow a broader search: (((( patients samples algorithm ) OR ( sediment anbs algorithm ))) OR ( element model algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("patients samples algorithm") OR ("sediment anbs algorithm"))) OR ("element model algorithm"))*.