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