Perhaps you should try some spelling variations:
"don optimizer algorithms" » "don optimized algorithms", "don optimization algorithms", "doan optimizer algorithms"
"dong optimized algorithm" » "dong optimized algorithms", "doang optimized algorithm", "cong optimized algorithm", "dung optimized algorithm"
"risk estimation algorithm" » "pose 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: (((("don optimizer algorithms") or ("dong optimized algorithm"))) or ("risk estimation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don optimizer algorithms") OR ("dong optimized algorithm"))) OR ("risk estimation algorithm")).
• Removing quotes may allow a broader search: (((( don optimizer algorithms ) or ( dong optimized algorithm ))) or ( risk estimation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (((("don optimizer algorithms") or ("dong optimized algorithm"))) or ("risk estimation algorithm"))*.