Perhaps you should try some spelling variations:
"tranquillizer gun" » "tranquilizer 2.6", "tranquilizern und", "tranquilizer 3"
"tranquilizer und" » "tranquilize _", "tranquilizers _"
"tranquilizer iv" » "tranquilizer 2.6", "tranquilize _", "tranquilizers _"

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: (((("tranquillizer gun") OR ("tranquilizer iv"))) OR ("tranquilizer und")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"tranquillizer gun\") OR (\"tranquilizer iv\"))) or (\"tranquilizer und\"))".
• Removing quotes may allow a broader search: (((( tranquillizer gun ) OR ( tranquilizer iv ))) or ( tranquilizer und )).
• Adding a wildcard symbol may retrieve word variants: (((("tranquillizer gun") OR ("tranquilizer iv"))) or ("tranquilizer und"))*.