Where can I find them?
The word "dharma" has many meanings. The most common meaning, and the meaning that people think of when they hear the word, is "morality". But dharma has other meanings like nature, property, quality, etc:
धर्म m. dharma attribute
धर्म m. dharma nature
धर्म m. dharma manner
"Dharma" in this context you cited just means "property". So, hunger, thirst, etc. are all properties (dharmas) of the body, whereas happiness, sadness, etc. are properties of the mind since they are emotions.