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