Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"bay van viet snippets" » "bay san viet snippets", "bay gian viet snippets", "bay tran viet snippets", "ban van viet snippets", "may van viet snippets", "bay dan viet snippets", "bay van 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: (((("bay van 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: (((("bay van viet snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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