Perhaps you should try some spelling variations:
"trinh hanh doanh snippets" » "trinh thanh doanh snippets", "trinh han doanh snippets", "trinh anh doanh snippets", "trinh hang doanh snippets", "trinh chinh doanh snippets", "trinh doanh doanh snippets", "trinh hanh doanh 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 hanh doanh 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 hanh doanh snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh hanh doanh snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh hanh doanh snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.