Perhaps you should try some spelling variations:
"dung dang thu snippets" » "dung dan thu snippets", "dung dong thu snippets", "dung danh thu snippets", "dung dang thuy snippets", "dung dang thuc snippets", "dung dang thi snippets", "dung dang thu slippers"
"using a code snippets" » "using a core snippets", "using a code slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("using a code snippets") or ("dung dang thu snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a code snippets") OR ("dung dang thu snippets"))) OR ("locating bug code snippets")).
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