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