Use the following Library of Congress Subject Terms for searches in either subject or keyword fields in conjunction with the name of the country:
Social life and customs
Economic*
Food
Use the following Thematic Terms for searches in keyword fields in conjunction with the name of the country:
Colonialism
Rites and ceremonies
Use the country name in conjunction with your terms.
Examples:
china and (social life and customs)
india and colonialism
haiti and health care