Perhaps you should try some spelling variations:
"khung hoang dat snippets" » "phuong hoang dat snippets", "khung hoang da snippets", "khung hoang dai snippets", "khung hoang dang snippets", "khung hoang 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: (((("khung hoang 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: (((("khung hoang dat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khung hoang dat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khung hoang dat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.