Perhaps you should try some spelling variations:
"quang hoan xac snippets" » "quang hoang xac snippets", "quang doan xac snippets", "quang thoai xac snippets", "quang toan xac snippets", "quang hoan lac snippets", "quang hoa xa snippets", "quang hoan xac 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: (((("quang hoan xac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quang hoan xac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("quang hoan xac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.