Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dan ban chan snippets" » "dan dan chan snippets", "dan ban than snippets", "dan ban nhan snippets", "van ban chan snippets", "can ban chan snippets", "dan ba chan 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: (((("dan ban chan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan ban chan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan ban chan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan ban chan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.