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