Perhaps you should try some spelling variations:
"locating bung code snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"duc duy cac snippets" » "duc huy cac snippets", "duc quy cac snippets", "duc dung cac snippets", "duc duy can snippets", "duc duc cac snippets", "duc duy bac snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("duc duy cac snippets") or ("python using java snippets"))) or ("locating bung code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duc duy cac snippets") OR ("python using java snippets"))) OR ("locating bung code snippets")).
• Removing quotes may allow a broader search: (((( duc duy cac snippets ) or ( python using java snippets ))) or ( locating bung code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc duy cac snippets") or ("python using java snippets"))) or ("locating bung code snippets"))*.