Perhaps you should try some spelling variations:
reflective gender » reflecting gender, perspective gender, reflective agency
commercial codes » commercial code, commercial courts, commercial crimes
based backend » based backup, based banking, based background
based based » based case, bed based, placed based
need based » needs based, speed based, bed based

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

• Performing a fuzzy search may retrieve terms with similar spellings: commercial codes ((((based based) OR (based backend))) or (need based)) reflective gender studies.~.
• If you are trying to use Boolean operators, they must be ALL CAPS: commercial codes ((((based based) OR (based backend))) OR (need based)) reflective gender studies.*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "commercial codes ((((based based) OR (based backend))) or (need based)) reflective gender studies.*".