Perhaps you should try some spelling variations:
"trinh doc hanh snippets" » "trinh do hanh snippets", "trinh hoa hanh snippets", "trinh co hanh snippets", "trinh hoc hanh snippets", "trinh duc hanh snippets", "trinh doi hanh snippets", "trinh doc hanh slippers"
"dung dung code snippets" » "duong dung code snippets", "ung dung code snippets", "dung ung code snippets", "dung dung cong snippets", "dung dung co snippets", "dung dung de snippets", "dung dung 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: (((("trinh doc hanh snippets") or ("dung dung code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh doc hanh snippets") OR ("dung dung code snippets"))) OR ("locating bug code snippets")).
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