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Searching for PHRASE yao tang chang.

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Use "or" to separate alternatives.
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Adjacent query terms default to one word proximity (words must occur next to each other).

Suggested query: Chang

Suggested query: yao or tang or chang

Suggested query: yao and tang and chang

For authors, list all variants that appear in citations, separated by "or", e.g.
m jordan or michael jordan or m i jordan or michael i jordan

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