Perhaps you should try some spelling variations:
"learning dan thuc snippets" » "learning data thuc snippets", "learning a thuc snippets", "learning due thuc snippets", "learning dan toc snippets", "learning am thuc snippets", "learning dan thuc slippers"
"creating a a snippets" » "creating _ a snippets", "reading a a snippets", "creating a a slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("learning dan thuc snippets") or ("creating a a snippets"))) or ("locating bug code snippets"))~.
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