Perhaps you should try some spelling variations:
"waste processing algorithm" » "waste processing algorithms" (Expand Search), "image processing algorithm" (Expand Search), "text processing algorithm" (Expand Search), "melt processing algorithm" (Expand Search)
"element model algorithm" » "element mould algorithm" (Expand Search), "elements model algorithm" (Expand Search)
"element three algorithms" » "elements three algorithms" (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 model algorithm") OR ("element three algorithms"))) OR ("waste processing algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"element model algorithm\") OR (\"element three algorithms\"))) OR (\"waste processing algorithm\"))".
• Removing quotes may allow a broader search: (((( element model algorithm ) OR ( element three algorithms ))) OR ( waste processing algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("element model algorithm") OR ("element three algorithms"))) OR ("waste processing algorithm"))*.