Perhaps you should try some spelling variations:
"trong thuc code snippets" » "trong thu code snippets", "thuong thuc code snippets", "trong thuat code snippets", "trong thuc co snippets", "trong thuc con snippets"
"dung dat de snippets" » "dung va de snippets", "dung tai de snippets", "dung vat de snippets", "dung hat de snippets", "dung dat dien snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("trong thuc code snippets") or ("dung dat de snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong thuc code snippets") OR ("dung dat de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trong thuc code snippets ) or ( dung dat de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong thuc code snippets") or ("dung dat de snippets"))) or ("locating bug code snippets"))*.