Perhaps you should try some spelling variations:
"modified network estimation algorithms" » "modified network estimation algorithm", "modified network optimization algorithms", "modified network optimisation algorithm", "certified network estimation algorithms", "defined network estimation algorithms", "modified near estimation algorithms"
"machines using method algorithm" » "machines using mom algorithm", "machinery using method algorithm", "machines nursing methods algorithm", "machines focusing method algorithm", "machines using metal algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("machines using method algorithm") OR ("modified network estimation algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"machines using method algorithm\") OR (\"modified network estimation algorithms\"))".
• Removing quotes may allow a broader search: (( machines using method algorithm ) OR ( modified network estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("machines using method algorithm") OR ("modified network estimation algorithms"))*.