Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"cong lon chi snippets" » "cong luong chi snippets", "cong dong chi snippets", "cong cong chi snippets", "cong long chi snippets", "cong con chi snippets", "cong luan chi 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 lon chi 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 lon chi snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong lon chi snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong lon chi snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.