Perhaps you should try some spelling variations:
"modified allocation optimization algorithms" » "modified allocation optimisation algorithm", "modified allocation estimation algorithms", "modified allocation estimation algorithm", "modified location optimization algorithms"
"machines using methods algorithm" » "machinery using methods algorithm", "machines nursing methods algorithm", "machines making methods algorithm", "machines counting methods algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"machines using methods algorithm\") OR (\"modified allocation optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( machines using methods algorithm ) OR ( modified allocation optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("machines using methods algorithm") OR ("modified allocation optimization algorithms"))*.