Search not find keywords in customized Attributes

I’ve check search index for my customized attributes. One Attribute name is “Nick Name” and vendor fill it with “Giant Jack” but when users search for “Giant Jack” it’s not find it, because it’s wrote in attributes.

If it’s a custom attribute, make sure that you marked it as Indexable, then re-save the vendor profile - after this, all the indexable attributes should be available in the keyword search.