Perhaps you should try some spelling variations:
"python using code snippets" » "python using cfd snippets", "python using one snippets"
"van dung tu snippets" » "van dong tu snippets", "xay dung tu snippets", "tin dung tu snippets", "van dung thu snippets", "van dung tru snippets", "van dung cu snippets"
"locating bug core snippets" » "locating bug code snippets"

Try widening your search to All Fields.

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