Leucanthemum comes to mind ...

Argyranthemum frutescens judging by the leaves - there are several yellow cultivars, so it might be 'Butterfly' or 'Elsa White'

Ignore my answer - Argyranthemum sounds more like it!

Well Shirley, I had to magnify the pic several times to see the leaves better, because Leucanthemum was my first thought to...

By the way, Pathumnan, if you want to respond, click in the box below and type it there so its in the right place rather than posting any response as another question...

Ok, that makes me feel better :o)