Perhaps you should try some spelling variations:
"trinh van hang snippets" » "trinh han hang snippets", "trinh quan hang snippets", "trinh toan hang snippets", "trinh van khang snippets", "trinh van hoang snippets", "trinh van thang snippets", "trinh van hang slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs 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: (((("trinh van hang snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trinh van hang snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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