Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"code control mppt algorithm" » "code control mom algorithm", "code control qspr algorithm", "mode control mppt algorithm", "case control mppt algorithm", "order control mppt algorithm", "code control mpc algorithm"

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (("code control mppt algorithm") OR ("modified multiobjective optimization algorithms"))~.
• Removing quotes may allow a broader search: (( code control mppt algorithm ) or ( modified multiobjective optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (("code control mppt algorithm") or ("modified multiobjective optimization algorithms"))*.