Sir , when you customize the search patern to display pattern|website name. the meta title always default to the default value not the search pattern?

Any updste on that?

Many thanks

the problem is that according to this.

Search page tags - what they means and how they works

There are many tabs on Search page those specify current location of user. Plugin always consider following search parameters: pattern, category, country, region, city. Based on which of these are empty and which are not, location of user (and usage of tab-specific configuration) is identified.

    Pattern - pattern defined, all other params are empty
    Category - category defined, all other params are empty
    Country - country defined, all other params are empty
    Region - region defined, all other params are empty
    City - city defined, all other params are empty
    Country + Catg. - country & category defined, all other params are empty
    Region + Catg. - region & category defined, country ignored, all other params are empty
    City + Catg. - city & category defined, country & region ignored, all other params are empty
    Pattern + Catg. - pattern & category defined, all other params are empty
    Default - none of above match

is you are using subdomain, then country is already define, there is not option Pattern +country so this goes to the default. Can we fix this?

So your question is related to subdomains?