Perhaps you should try some spelling variations:
"dung hoang tran snippets" » "dang hoang tran snippets", "dung hong tran snippets", "khung hoang tran snippets", "dung hoang tuan snippets", "dung hoang thanh snippets", "dung hoang van snippets", "dung hoang tran slippers"
"hang java java snippets" » "hang va java snippets", "hang 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 hoang tran snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung hoang tran snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung hoang tran snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung hoang tran snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.