Perhaps you should try some spelling variations:
variable » variables
vialle » valle, viable, viale
viallet » vallet, viablet, vialet, viollet
equivalent » equivalente, equivalentes, equivalencia
vida » via
vitales » vidales, viales
vital » vidal, vial
vistal » vista, vistas, nistal

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((variable or (((vialle OR viallet) or vitales) or equivalent)) or ((vida or vital) or vistal)).~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((variable OR (((vialle OR viallet) OR vitales) OR equivalent)) OR ((vida OR vital) OR vistal)).*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((variable or (((vialle OR viallet) or vitales) or equivalent)) or ((vida or vital) or vistal)).*".