"not show" as in not indexed, or not ranking??? Because there's a big difference...
If it's not indexed you need to index it (duh!), if it's not ranking... well... that's the tricky part and you'll need to optimize the homepage for your brand term and to also give it enough authority in order to rank. Authority in this case = backlinks...
On top of this, I think branded homepages can rank for your brand without many backlinks but you'll need brand awareness / popularity (constant and big social media presence, lots of traffic, quality PR campaigns, etc).
Just because you insert a branded word into the homepage of a new site doesn't mean that google will miraculously rank you #1 for that brand, although, this would be normal in any normal society but we're not living in a normal one