Perhaps you should try some spelling variations:
"trinh phap cai snippets" » "trinh phan cai snippets", "trinh han cai snippets", "trinh chat cai snippets", "trinh phap tai snippets", "trinh phap ca snippets", "trinh phap cac snippets"
"dung bug code snippets" » "dung dung code snippets", "dung hung code snippets", "dung rung code snippets", "dung bug core snippets"
"locating bug 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: (((("dung bug code snippets") or ("trinh phap cai snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung bug code snippets") OR ("trinh phap cai snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung bug code snippets ) or ( trinh phap cai snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung bug code snippets") or ("trinh phap cai snippets"))) or ("locating bug code snippets"))*.