You can just use "ugh"(呃 in Chinese). This interjection is also widely used in Chinese.

哇 = wa

呵呵 sarcastic laugh, used to.express contempt

It depends on different people. but mostly used：啊！to express surprise or something you cannot stand. 呸！is a little bit bad language to express disdain. 哎呀：most girls like to use it to express annoyance, boys do not use them ofen, because it sounds like a girl. 哎/唉 to express disappointed or tired. You can just use the words you're used to. I think people understand them by tone, not the word itself.

呸/哎/啊