Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"duc dung van snippets" » "duc hung van snippets", "duc cuong van snippets", "duc phung van snippets", "duc duong van snippets", "duc dung va snippets", "duc dang van snippets", "duc dung van 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: (((("duc dung van snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc dung van snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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