Perhaps you should try some spelling variations:
variable » variables
viade » viadel, viader, viage
viadal » viada, viadel, piadal
vider » video, lider, videa, videor, wider, vidar
vide » video, wide, vida
vitae » vistae, viae, vidae
vita » vista, via, vida
vital » vistal, vial, vidal

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((vitae or variable) or (((viade or viadal) or viaje) or (vider OR vide))) or (vita or vital)).~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((vitae OR variable) OR (((viade OR viadal) OR viaje) OR (vider OR vide))) OR (vita OR vital)).*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((vitae or variable) or (((viade or viadal) or viaje) or (vider OR vide))) or (vita or vital)).*".