Perhaps you should try some spelling variations:
"lethal injection" » "lethal infection", "ethanol injection", "lethal interactions"
"local injection" » "local injections", "local infections", "coal injection"
"metal injection" » "metal interaction", "cell injection", "metal detection"

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: (((("lethal injection") OR ("local injection"))) OR ("metal injection")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"lethal injection\") OR (\"local injection\"))) or (\"metal injection\"))".
• Removing quotes may allow a broader search: (((( lethal injection ) OR ( local injection ))) or ( metal injection )).
• Adding a wildcard symbol may retrieve word variants: (((("lethal injection") OR ("local injection"))) or ("metal injection"))*.