Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hanh ky chon snippets" » "hanh kem chon snippets", "hanh ky cho snippets", "hanh ly chon snippets", "hanh ky chinh snippets"
"locating bug code snippets" » "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: (((("hanh ky chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hanh ky chon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hanh ky chon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hanh ky chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.