Perhaps you should try some spelling variations:
"thong tan dac snippets" » "thong than dac snippets", "thong tran dac snippets", "thong tin dac snippets", "thong ban dac snippets", "thong gian dac snippets", "thong toan dam snippets", "thong tan dac 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: (((("thong tan dac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thong tan dac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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