Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan nam can snippets" » "van nam can snippets", "dong nam can snippets", "dinh nam can snippets", "dan nam dan snippets", "dan nam cao snippets", "dan nam cac 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 nam can 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 nam can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan nam can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan nam can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.