Perhaps you should try some spelling variations:
"dung quang ham snippets" » "dang quang ham snippets", "luong quang ham snippets", "dung luan ham snippets", "dung quang nam snippets", "dung quang lam snippets", "dung quang dam snippets", "dung quang ham 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 quang ham 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 quang ham snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung quang ham snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
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