Perhaps you should try some spelling variations:
"luong java java snippets" » "luong va java snippets", "luong java java slippers"
"dung cong hat snippets" » "dung trong hat snippets", "dung cong nhat snippets", "dung cong chat snippets", "dung cong ha snippets", "dung cong hat 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: (((("luong java java snippets") or ("dung cong hat snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong java java snippets") OR ("dung cong hat snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong java java snippets ) or ( dung cong hat snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong java java snippets") or ("dung cong hat snippets"))) or ("locating bug code snippets"))*.