As you are searching the online catalog and databases, always take note of the Subjects being used to describe the source you are viewing. This can give you great ideas of terms to use in your next search! For your project, here are some suggested subject terms to consider:
minority family life
ethnic groups culture
parent & child assimilation
parenting style(s) interpersonal relations
families "family structure"
community dynamics kinship
For your individual cultural/ethnic groups, there are often different search terms to try. Here are some examples:
If you have trouble finding materials, contact a librarian to ask for search term alternatives for your specific culture/ethnic group.