can be any words used to describe a concept or idea. Keyword search is the most flexible way to research a topic.
minimalism
consumerism
voluntary simplicity
meaning of life
happiness
food and culture
food and history
food and (immigration or migration)
Middle Eastern Food
Asian food
Korean food
al pastor taco
baba nagoush
boba
(Kimchee or kimchi or kim chee)
pozole
ramen
Starbucks
social media
cybercrime
privacy
covid-19
Covid-19 and discrimination
pandemic and environment*
climate change and pandemic
civilization and pandemic
science and pandemic
trauma and pandemic
(covid-19 or coronavirus or 2019-ncov)
over-consumption or consumerism
are "controlled vocabulary" -- words and phrases -- that are used to categorize / organize information resources (books, articles, and other media) so researchers can find them more easily: Grouped under a "subject" regardless of what synonyms, variant spellings, and homographs authors/editors may have used. Researchers can't invent subject words but they can discover the subject word(s) for a topic in the description of a book, an article, or other information sources. ~ paraphrased from this source.
simplicity
sustainability
consumption
happiness