Yes, foreign literature can be found in foreign graduation thesis. Need to query on the corresponding website.

Foreign papers generally go to: Zhang Qiao Scientific Research, Cambridge University Institutional Repository, LolMy Thesis Harvard Graduation Thesis Sharing Website and other academic related websites.

To query foreign papers, you can first enter keywords, article titles or references in Google Academic to retrieve relevant information of documents, some of which can be downloaded directly, some of which are related information such as DOI number, author, year, and which database the documents are included in. You can use DOI number to get papers from sci-hub. It can also be obtained from a database containing literature.