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