When developing your search strategy, it is helpful to brainstorm variations or synonyms of the key concepts you're researching. For example, if you are researching cultural differences in child rearing practices, you might try different combinations of the following search terms:
"child rearing" OR parenting
attitudes OR values
When researching early/middle childhood, you might choose specific ailments, such as: "developmental disability" or concepts associated with childhood, like preschool, "school readiness", etc.
While Social Work Abstracts and Social Services Abstracts are always best bets for finding social work literature, consider searching the following databases as well.