Perhaps you should try some spelling variations:
"research proteases" » "research progresses", "research projektes", "research proteins"
"research processes" » "research procedures", "research projects", "research practices", "research projectses", "research projectes", "research programes"
"research progress" » "research program", "research project", "research projects"
"research problems" » "research project", "research program", "research projects"
"research prozess" » "research propels", "research projects", "research proteins"
"research process" » "research projects", "research project", "research program"

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: (((("research prozess") OR ((("research proteases") OR ("research processes"))))) OR ((("research process") OR ((("research progress") OR ("research problems")))))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"research prozess\") or (((\"research proteases\") OR (\"research processes\"))))) or (((\"research process\") or (((\"research progress\") or (\"research problems\"))))))".
• Removing quotes may allow a broader search: (((( research prozess ) or ((( research proteases ) OR ( research processes ))))) or ((( research process ) or ((( research progress ) or ( research problems )))))).
• Adding a wildcard symbol may retrieve word variants: (((("research prozess") or ((("research proteases") OR ("research processes"))))) or ((("research process") or ((("research progress") or ("research problems"))))))*.