Perhaps you should try some spelling variations:
"modified objective estimation algorithm" » "modified objective optimization algorithm", "modified objective allocation algorithm"
"modified passive quantization algorithmssss" » "modified adaptive quantization algorithmssss", "modified passive quantization 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 objective estimation algorithm\") OR (\"modified passive quantization algorithmssss\"))~".
• Removing quotes may allow a broader search: (( modified objective estimation algorithm ) OR ( modified passive quantization algorithmssss ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective estimation algorithm") OR ("modified passive quantization algorithmssss"))*.