Perhaps you should try some spelling variations:
"wan colony optimization algorithm" » "wang colony optimization algorithm" (Expand Search), "want colony optimization algorithm" (Expand Search), "wan colon optimization algorithm" (Expand Search), "wan colony optimizacion algorithm" (Expand Search)
"ant colony optimisation algoritmo" » "ant colon optimisation algoritmo" (Expand Search), "ante colony optimisation algoritmo" (Expand Search), "anti colony optimisation algoritmo" (Expand Search), "kant colony optimisation algoritmo" (Expand Search), "ant colony optimizacion algoritmo" (Expand Search)

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("wan colony optimization algorithm") OR ("ant colony optimisation algoritmo"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"wan colony optimization algorithm\") OR (\"ant colony optimisation algoritmo\"))".
• Removing quotes may allow a broader search: (( wan colony optimization algorithm ) OR ( ant colony optimisation algoritmo )).
• Adding a wildcard symbol may retrieve word variants: (("wan colony optimization algorithm") OR ("ant colony optimisation algoritmo"))*.