User-agent: Yandex
Disallow: /search.html
Clean-param: C&D&O&A

User-agent: Googlebot
Disallow: /search.html
Disallow: /*?C=
Disallow: /*?D=
Disallow: /*?O=
Disallow: /*?A=

User-agent: *
Disallow: /search.html

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