Perhaps you should try some spelling variations:
"trinh de doanh snippets" » "trinh den doanh snippets", "trinh do doanh snippets", "trinh he doanh snippets", "trinh te doanh snippets", "trinh dao doanh snippets", "trinh doi doanh snippets", "trinh de 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 de 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 de doanh snippets") OR ("dung bug code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trinh de doanh snippets ) or ( dung bug code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trinh de doanh snippets") or ("dung bug code snippets"))) or ("locating bug code snippets"))*.