Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"tan hoc duoc snippets" » "tan hoc nuoc snippets", "tan hoa duoc snippets", "tan hoc dung snippets", "toan hoc duoc snippets", "than hoc duoc snippets", "van hoc duoc snippets", "tan hoc duoc 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: (((("tan hoc duoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan hoc duoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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