Search strategies for locating materials on the peoples, countries, and cultures of Latin America, Hispanoamerica, Latinx, Spanish speaking countries, etc.:
Hispanic OR Hispanoameric* OR "Latin American" OR Latinx
Sample search for Latin American literature or culture in OneSearch
Using "Spanish speaking" will retrieve a lot of information on working with Spanish speakers in various industries, like healthcare or education, but it rarely reflects "Spanish speaking countries" in the databases we use for our research. If you are looking specifically at Spanish speaking countries, it is more productive to search for a group of the individual countries: