Perhaps you should try some spelling variations:
sino » sind, sindo, signo
sinn » sinne, sind, inn, sindn, signn
sindn » sinden, sind, sinan, sinddn, signdn
sindin » sinding, sindian, swindin, sinddin, signdin
sin » sind, sign

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: ((sino OR (sinn OR (sindn OR sindin))) OR sin) / early works to 1800.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((sino or (sinn or (sindn OR sindin))) or sin) / early works to 1800".
• Adding a wildcard symbol may retrieve word variants: ((sino or (sinn or (sindn OR sindin))) or sin) / early works to 1800*.