Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nao nam cac snippets" » "dao nam cac snippets", "nam nam cac snippets", "ngoc nam cac snippets", "nao nam cao snippets", "nao nam sach 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: (((("nao nam cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nao nam cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nao nam cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nao nam cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.