How identify a piece of land when the map coordinates doesn't list it

Hello,
I have used all the search mechanism that I know is available on the HM Land Registry portal but it only shows properties around the land not the land itself. 
Can I write in with the details for someone to help to identify the land?

Thanks

Hello Omolade - you would need to apply for a search of the index map 
Get information about property and land: Search the index map - GOV.UK

Thank you much appreciated