Perhaps you should try some spelling variations:
"modified objective estimation algorithms" » "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective approximation algorithms", "modified objective allocation algorithms"
"modified marine estimation algorithm" » "modified motion estimation algorithm", "modified risk estimation algorithm", "modified caging estimation algorithm", "modified male estimation algorithm", "modified passive estimation algorithm"

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

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