Nok brings a vast amount of stuff when we come back from Hols. Papaya is the favourite as they are "too expensive" over here. Also lemon grass, leaves of various nature, Basil type things (normally dried and de-stalked to save weight), Garlic cloves, shallots, Chillies (dried) and various packets of seasoning's etc (Knorr).
Do NOT bring any fresh meat or fish products, they are definitely not allowed.
We were stopped in UK Customs last time we came back and the lady went through everything and all the stuff she had was allowed without any comment at all. Was asked about the "fresh" stuff before she opened the cases.