A great starting point to find articles is Library Search. This is a tool which enables you to search the library catalogue and other resources (e.g. journal or newspaper articles, reports) in one simple search.
For a more comprehensive search, consider searching subject focused databases such as:
Three multidisciplinary databases: Arts & Humanities Citation Index (1975 - present), Social Sciences Citation index (1898 - present), and Science Citation Index (1970 - present). They index the core journals with details of articles, some with abstracts, but do not contain the full text of articles
Site offers a searchable database of published papers with abstracts and full bibliographic descriptions relating to the social sciences which are available for viewing or downloading. However, please note that some content may be locked and require a subscription.
SAGE journals is the platform to access journals and articles published by SAGE. Users can cross-search all owned/subscribed titles. Coverage is particularly strong in business and management, education, health, linguistics, politics, psychology and sociology.