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", "trong thuc code slippers"
"cong dung code snippets" » "cuong dung code snippets", "cong dong code snippets", "cong luong code snippets", "cong dung cong snippets", "cong dung co snippets", "cong dung de snippets", "cong dung code slippers"
"locating bug code snippets" » "locating bug code slippers", "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 ("cong dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong thuc code snippets") OR ("cong dung code snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("trong thuc code snippets") or ("cong dung code snippets"))) or ("locating bug code snippets"))*.