Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"doi hoc vinh snippets" » "doi hoc sinh snippets", "doi hoc kinh snippets", "doi hoc chinh snippets", "doi hoac vinh snippets", "dai hoc vinh snippets", "hoi hoc vinh snippets", "doi hoc vinh 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: (((("doi hoc vinh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi hoc vinh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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