Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"van san phan snippets" » "van san pham snippets", "van van phan snippets", "van sat phan snippets", "van sang phan snippets", "van ban phan snippets", "van son phan snippets", "van san phan 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: (((("van san phan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van san phan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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