Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"pham cay cong snippets" » "pham xay cong snippets", "pham ca cong snippets", "pham can cong snippets", "pham cac cong snippets", "pham cao cong snippets", "pham cau cong 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: (((("pham cay cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham cay cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham cay cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham cay cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.