Perhaps you should try some spelling variations:
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"coder vector coding study protocol" » "under vector coding study protocol" (Expand search), "model vector coding study protocol" (Expand search), "order vector coding study protocol" (Expand search), "coder vector scoping study protocol" (Expand search), "coder vector recording study protocol" (Expand search), "coder vector modeling study protocol" (Expand search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("coder vector coding study protocol") OR ("and python python python programming"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"coder vector coding study protocol\") OR (\"and python python python programming\"))".
• Removing quotes may allow a broader search: (( coder vector coding study protocol ) OR ( and python python python programming )).
• Adding a wildcard symbol may retrieve word variants: (("coder vector coding study protocol") OR ("and python python python programming"))*.