Perhaps you should try some spelling variations:
"modified _ approximation algorithm" » "modified _ approximation algorithms"
"modified pose optimization algorithms" » "modified pose optimisation algorithm", "modified pose estimation algorithms", "modified pose estimation algorithm", "modified qoe optimization algorithms", "modified game optimization algorithms", "modified response optimization algorithms", "modified male optimization algorithms", "modified passive optimization algorithms"

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: "((\"modified _ approximation algorithm\") OR (\"modified pose optimization algorithms\"))~".
• Removing quotes may allow a broader search: (( modified _ approximation algorithm ) OR ( modified pose optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified _ approximation algorithm") OR ("modified pose optimization algorithms"))*.