If you're wanting to research adulthood, SocIndex is a great resource to use (linked to the right).
When developing your search strategy, it is helpful to brainstorm variations or synonyms of the key concepts you're researching. For example, based on the suggestions from your syllabus, if you are researching sexuality, you might try different combinations of the following search terms:
sexuality OR sexual orientation OR gender identity
You might choose more specific topics, such as: bisexuality, open marriages, gay couples, etc.
Alternate version: SocINDEX with Full Text in the classic EBSCO user interface (best for exporting more than 50 results or combining saved searches). SocINDEX with Full Text offers comprehensive coverage of sociology, encompassing all sub-disciplines and closely related areas of study. These include abortion, criminology & criminal justice, demography, ethnic & racial studies, gender studies, marriage & family, political sociology, religion, rural & urban sociology, social development, social psychology, social structure, social work, socio-cultural anthropology, sociological history, sociological research, sociological theory, substance abuse & other addictions, violence and many others.