Create your search engine here: <a target="_blank" href="https://cse.google.com/cse/create/new">https://cse.google.com/cse/create/new</a>
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After creation go to:
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"Edit Search Engine"  (make sure that your created search engine is selected if there are several search engines) -> Setup -> click "Search engine ID" button to get the ID.
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Go to "Edit Search Engine" -> Look and Feel -> Layout -> Select "Two page" layout.
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Then go to "Edit Search Engine" -> "Get Code" -> click "Search Results Details" -> specify the following URL in first input:
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<b>{0}</b>
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To show search results right on your site.
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To change background of search results (and other elements) go to:
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"Edit Search Engine" -> Look and feel -> General -> Background color.