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