Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"van ngoc cac snippets" » "tran ngoc cac snippets", "van hoc cac snippets", "van nghe cac snippets", "van ngon cac snippets", "van ngoc chau snippets", "van ngoc phac 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 ngoc cac 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 ngoc cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( van ngoc cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("van ngoc cac snippets"))) or ("locating bug code snippets"))*.