Perhaps you should try some spelling variations:
codon optimization » wolf optimization (Expand Search)
used optimization » based optimization (Expand Search), led optimization (Expand Search), guided optimization (Expand Search)
binary polymers » binary polymer (Expand Search)
polymers used » primers used (Expand Search), polymer based (Expand Search), polymers due (Expand Search)
binary var » binary pairs (Expand Search)

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( binary var codon optimization algorithm ) OR ( binary polymers used optimization algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( binary var codon optimization algorithm ) OR ( binary polymers used optimization algorithm ))".
• Adding a wildcard symbol may retrieve word variants: (( binary var codon optimization algorithm ) OR ( binary polymers used optimization algorithm ))*.