For example I have 2 wiki pages. First page includes such keywords as AD.180, AD.159, AD.200, second page includes keywords AD.300, AD.180, AD.159. If I search for AD.300 it displays me all pages which have AD before the number. Search doesn't take the AD.300 as a whole word, it searches for everything what has AD, not only AD.300.
How do I solve it?