Perhaps you should try some spelling variations:
"dung anh xquang snippets" » "dung anh quang snippets", "dung anh quan snippets", "dung anh xuan snippets", "dung danh xquang snippets", "duong anh xquang snippets", "dong anh xquang snippets", "dung anh xquang 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: (((("dung anh xquang snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung anh xquang snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung anh xquang snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung anh xquang snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.