Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"cac hoc khi snippets" » "cach hoc khi snippets", "cac hop khi snippets", "bac hoc khi snippets", "cac hoc khoi snippets", "cac hoc khia snippets", "cac hoc ki snippets", "cac hoc khi 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: (((("cac hoc khi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac hoc khi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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