Perhaps you should try some spelling variations:
"quan dan hoat snippets" » "quan dan code snippets", "quan doan hoat snippets", "quan den hoat snippets", "quan van hoat snippets", "quan van hoa snippets", "quan dan hoc snippets", "quan danh hoa snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung java java snippets") or ("quan dan hoat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("quan dan hoat snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( quan dan hoat snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("quan dan hoat snippets"))) or ("locating bug core snippets"))*.