Perhaps you should try some spelling variations:
"tranquillizer gun" » "tranquilizer und", "tranquilizern und", "tranquilizer 3"
"tranquilizer 2.6" » "tranquilizer und", "tranquilizern und", "tranquilize _"
"tranquilizer iv" » "tranquilizer und", "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 2.6")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"tranquillizer gun\") OR (\"tranquilizer iv\"))) or (\"tranquilizer 2.6\"))".
• Removing quotes may allow a broader search: (((( tranquillizer gun ) OR ( tranquilizer iv ))) or ( tranquilizer 2.6 )).
• Adding a wildcard symbol may retrieve word variants: (((("tranquillizer gun") OR ("tranquilizer iv"))) or ("tranquilizer 2.6"))*.