Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong ban chat snippets" » "cong bang chat snippets", "cong san chat snippets", "cong tan chat snippets", "cong van chat snippets", "cong bao chat snippets", "cong luan chat 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: (((("cong ban chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong ban chat snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong ban chat snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong ban chat snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.