Phormium.

@ ArgyBee
thank for your information.. :)

Phormium - the tips are convincing - the centre is quite densely packed but maybe that's because it's in tropical Thailand

Nice frame..

@ Leuba.
When it get older the tree bigger in dark brown color whice you can see the ring leaves when the leaves is falling..it can be very tall 2-3 M. or more.
I will taking more pics when I see the seed as well..ok?

Looks like Phormium ( New Zealand Flax) - the leaf tips look very like the plant we have here -but the centre is very organised.

At Kew there are low growing Pandanus species with fine leaves like this. That's what it reminded me of, not the tree sized ones! Just a guess based on that.
Have you ever seen it flower and is it growing wild or cultivated in a garden?

@ craigwilliams
Nope..that is not a Pandanus ..it is much bigger and taller a lot and grow where is dry like mountain with lime stone.

Some kind of Pandanus maybe?

smooth, waxy, flexible leaves and grow leaves from the ground when it still young getting older some of old leaves are fall and can see the tree as well.

Does it have smooth, waxy, flexible leaves or dry, leathery, spiked leaves? Does it grow leaves from the ground or a tree-like trunk? If it is the second answer to both questions; it could be a Yucca