Perhaps you should try some spelling variations:
variable » variables
vialle » viallet, valle, viable
vitale » vitales, vitae, vistale, viale, vidale
vistale » visuales, cristale, distales, vistae, vistase, nistale
equivalent » equivalente, equivalentes, equivalencia
vita » vista, via, vida
vital » vistal, vial, vidal
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 (vitale OR vistale)) or equivalent)) or ((vita or vital) or vistal)).~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((variable OR ((vialle OR (vitale OR vistale)) OR equivalent)) OR ((vita OR vital) OR vistal)).*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((variable or ((vialle or (vitale OR vistale)) or equivalent)) or ((vita or vital) or vistal)).*".