Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"lua hoc vinh snippets" » "lua hoc sinh snippets", "lua hoc kinh snippets", "lua hoc chinh snippets", "luan hoc vinh snippets", "luc hoc vinh snippets", "cua hoc vinh snippets", "lua 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: (((("lua 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: (((("lua hoc vinh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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