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What should I do? I can't find any literature about the topic of my chosen thesis.
I can't find any literature about the topic of my chosen thesis. It can be solved like this

1, find similar literature to support derived data.

2. Re-optimize the theme of the paper according to different documents.

3. Find more documents in several databases to see if there are any relevant and useful documents.

To extend it, in fact, the topic of the paper can be a general idea at the beginning, and it is also feasible to determine the topic according to the content at last.