Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"voi dac viet snippets" » "voi dao viet snippets", "voi bac viet snippets", "voi dac biet snippets", "voi cac viet snippets", "voi dai viet snippets", "voi dan viet snippets", "voi dac viet 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: (((("voi dac viet snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("voi dac viet snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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