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