In the Philippines, an academic thesis is named by the degree, such as bachelor/undergraduate thesis or masteral thesis. However, in Philippine English , the term doctorate is typically replaced with doctoral (as in the case of "doctoral dissertation"), though in official documentation the former is still used. The terms thesis and dissertation are commonly used interchangeably in everyday language yet it generally understood that a thesis refers to bachelor/undergraduate and master academic work while a dissertation is named for doctorate work.
If you are writing an interpretation, you should reread the text or study your subject thoroughly, doing your best to notice something new each time you examine it. As you come up with a possible interpretation to develop in an essay, you should re-examine your subject with that interpretation in mind, marking passages (if your subject is a literary text) and taking plenty of notes on your subject. Studying your subject in this way will make it easier for you to find supporting evidence for your interpretation as you write your essay.