Perhaps you should try some spelling variations:
"dinh cho code snippets" » "dinh chon code snippets", "danh cho code snippets", "dinh chi code snippets", "dinh cho cong snippets", "dinh cfd code snippets", "dinh cho con snippets", "dinh cho code slippers"
"dung cho code snippets" » "dung cho cong snippets", "dung cfd code snippets", "dung cho con snippets", "dung cho 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: (((("dinh cho code snippets") or ("dung cho code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dinh cho code snippets") OR ("dung cho code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dinh cho code snippets ) or ( dung cho code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dinh cho code snippets") or ("dung cho code snippets"))) or ("locating bug code snippets"))*.