Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"van toan cac snippets" » "van tuan cac snippets", "van tan cac snippets", "van thanh cac snippets", "van toan cao snippets", "van toan cau snippets", "van toan xac 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 toan cac 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 toan cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van toan cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van toan cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.