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