Perhaps you should try some spelling variations:
"lang mang dat snippets" » "lang man dat snippets", "lang thang dat snippets", "lang muong dat snippets", "lang mang dau snippets", "lang hoang dat snippets", "lang hang dau snippets", "lang mang dat 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.

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

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