Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"phung van cac snippets" » "phung van hac snippets", "phung van cau snippets", "phung van bac snippets", "phuong van cac snippets", "nhung van cac snippets", "chung van cac 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 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: (((("phung van cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phung van cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phung van cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.