Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"don phuc cua snippets" » "dong phuc cua snippets", "do phuc cua snippets", "don chuc cua snippets", "don thuc cua snippets", "don hoc cua snippets", "don phuc vu snippets"
"locating bug code snippets" » "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: (((("dung java java snippets") or ("don phuc cua snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("don phuc cua snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( don phuc cua snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("don phuc cua snippets"))) or ("locating bug code snippets"))*.