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