Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"zhan cao duc snippets" » "zhan gao duc snippets", "toan cao duc snippets", "nha cao duc snippets", "zhan dao duc snippets", "zhan cao suc snippets", "zhan giao duc snippets", "zhan cao duc 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: (((("zhan cao duc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("zhan cao duc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( zhan cao duc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("zhan cao duc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.