Perhaps you should try some spelling variations:
"variable start" » "variable stars", "variable part", "variable stage", "variable starst", "variable stept"
"variable state" » "variable stars", "variable space", "variable scale"
"variable star" » "variable stars", "variable step"

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