elgg_get_entities([
  'type' => 'object',
  'subtype' => 'blog',
  'owner_guid' => $user_guid, // User xyz's guid 
  'metadata_name_value_pairs' => [
      ['name' => 'description', 'value' => '%abcd%', 'operand' => 'LIKE'],
      ['name' => 'time_created', 'value' => strtotime('01 March 2010'), 'operand' => '>='],
      ['name' => 'time_created', 'value' => strtotime('31 March 2010'), 'operand' => '<='],
  ],
]);

I have not tested the code but this should do the trick. And the code is for Elgg 3.x.

$dbprefix = elgg_get_config('dbprefix');
$start = strtotime('01 March 2010');
$end = strtotime('31 March 2010');
$content = elgg_list_entities([
  'type' => 'object',
  'subtype' => 'blog',
  'owner_guid' => $user_guid,
  'joins' => ["JOIN {$dbprefix}objects_entity oe on e.guid = oe.guid"],
  'wheres' => ["oe.description LIKE '%abcd%' AND e.time_created BETWEEN {$start} AND {$end}"],
]);

Hi RvR, I just tested my code and its 100% working. I created a blog having the string abcd in description. I executed my code and it gave me the exact blog guid and other relevant details.

Here's a screenshot for you.

May I know what made you think that the code is wrong.

Missed that it's Elgg 3. Sorry my bad.

Many thanks from the core of my heart. Can it be released (by any of you) as an Elgg 3 plugin ? Thanks again.