Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"van dinh cu snippets" » "van minh cu snippets", "van dich cu snippets", "va dinh cu snippets", "van dinh cuu snippets", "van dinh chuc snippets", "van dinh chau 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 ("van dinh cu snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("van dinh cu snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van dinh cu snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van dinh cu snippets"))) or ("locating bug code snippets"))*.