To 'WANT' - เอา 'ao' is NOT interchangeable with อยาก 'yàak'

In a Thai language specimen from a learner I received recently for a Speech Analysis, one of the sentences that jumped out at me that he used a couple of times was: &#xE1C;&#xE21;&#xE40;&#xE2D;&#xE32;&#xE40;&#xE23;&#xE35;&#xE22;&#xE19;&#xE20;&#xE32;&#xE29;&#xE32;&#xE44;&#xE17;&#xE22; po&