It is a filter without a query string. Search instead for your query (two search links). To hide/opt-out the search results snippets from sister projects, go to Preferences → Gadgets → Appearance and see "Do not show search results for sister projects on the search results page". All filters can have grey-space between them without affecting search results. Can be used negatively by prefixing a hyphen, which will return pages that do not link to the given page. A single result (one each) from selected sister projects appears on the right side of the page (the most likely relevant match for each). Search "folds" character families, matching similar-looking letters across alphabets, to match foreign terms.
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