Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"pha tan viet snippets" » "pha tran viet snippets", "pha toan viet snippets", "pha than viet snippets", "pha tap viet snippets", "pha ban viet snippets", "pha san viet snippets", "pha tan 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: (((("pha tan 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: (((("pha tan viet snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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