Thong Nuea Kao (2013)

They are similar from Storyline and how the son being grateful to her Mother. And the ost was quite similar to this Melodrama

Thong Nuer Kao is similar to Krong Karm :
-Same directors
-Same young ML
-Karma topic and retribution

E-Sa is similar to Thong Nuea Kao:
1) Historical drama with moral
2) Same female lead
3) Femal lead involved with several men