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Use it if you don't know exactly what to search for or several versions exist
* - matches any number of characters
E.g., András* matches these: "andrásnak", "andrással", "andrásékhoz".
? - matches zero or one character
E.g., utc?a matches both "utcza" and "utca".
! - matches exactly one character
E.g., utc!a matches: "utcza", but does not find "utca".
Use it to link more search expressions together
AND - provides results containing both expressions.
E.g., Petőfi AND Sándor finds all results containing both "Petőfi" and "Sándor".
OR - provides results containing at least on of the expressions.
E.g., Petőfi OR Kossuth finds all results containing "Petőfi" or "Kossuth" or both.
NOT - provides results containing the expression before the "NOT", but not the one after it.
E.g., Petőfi NOT Sándor finds all results containing "Petőfi", but not "Sándor".
Use it when the distance between the search expressions is important
" " - only finds results containing the exact same expressions as included within the quotation marks
E.g., "Petőfi Sándor" finds all results containing both "Petőfi" and "Sándor" placed next to each other exactly in this order.
[number]W - only finds results containing both expressions which are situated within the given distance. You can use it with any number.
E.g., Petőfi 6W Sándor finds "Petőfi, avagy Sándor" as both expressions are within the given distance (6 words).
[number]N - similar as above, but matches in any order
E.g., Petőfi 6N Sándor matches "Sándor (a Petőfi)".