Search for keywords, #hashtags, $sites, add a dash to exclude, e.g. -$theonion.com
From planespotters.net
01-0040 United States Air Force Boeing C-40B (737-7DM(WL) BBJ)
1 1
01-0040 United States Air Force Boeing C-40B (737-7DM(WL) BBJ) photographed at Beijing Capital (PEK / ZBAA) by Yiran
on Sep 6