Chào! if you are accessing The Gnome’s Garden on Facebook on a Mobile device you will find that only postings by “Vườn của Gnome” show up. Facebook’s default setting is for a filter that shows the page’s entries on the Timeline.
Note that the view below is the Mobile version of the page even though I am using Firefox 11 to show it on.
Anyway, you can set the filter to “All” Instead: