This is the 3889th most frequent Japanese word.
カンボジア
Cambodia.
In this sentence, 'カンボジア' is used as an adjective to describe the origin of the cuisine being referred to.
カンボジアの伝統的な料理を試したいです。
I want to try traditional Cambodian cuisine.
Here, 'カンボジア' indicates the location where the volunteer work took place.
彼はカンボジアでボランティア活動をしました。
He did volunteer work in Cambodia.
In this usage, 'カンボジア' functions as the subject of the sentence, directly referring to the country.