Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dam phan cac snippets" » "d phan cac snippets", "va phan cac snippets", "van phan cac snippets", "dam nhan cach snippets", "dam phan dau snippets", "dam phan lap 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: (((("dam phan 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: (((("dam phan cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dam phan cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dam phan cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.