Perhaps you should try some spelling variations:
"manisch depressive disorders" » "manisch depressive disorder", "manic depressive disorders"
"build aggressive disorders" » "build depressive disorder", "build recessive disorders", "build aggressive diseases", "being aggressive disorders", "build impressive disorders", "based aggressive disorders"
"und aggressive disorders" » "und depressive disorder", "und recessive disorders", "und aggressive diseases", "und aggressives disorders", "und aggressiver disorders", "und aggressiven disorders"

Try widening your search to All Fields.

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: (("manisch depressive disorders") OR ((("build aggressive disorders") OR ("und aggressive disorders")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"manisch depressive disorders\") or (((\"build aggressive disorders\") OR (\"und aggressive disorders\"))))".
• Removing quotes may allow a broader search: (( manisch depressive disorders ) or ((( build aggressive disorders ) OR ( und aggressive disorders )))).
• Adding a wildcard symbol may retrieve word variants: (("manisch depressive disorders") or ((("build aggressive disorders") OR ("und aggressive disorders"))))*.