Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan moi con snippets" » "ban moi con snippets", "dai moi con snippets", "dan hoi con snippets", "dan moi cong snippets", "dan moi co snippets", "dan mot con 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 moi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan moi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan moi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan moi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.