Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nam chon do snippets" » "nam cho do snippets", "nam hon do snippets", "nam chien do snippets", "nam chong doc snippets", "nam chon loc snippets", "nam chon dia 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 chon do 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 chon do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nam chon do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nam chon do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.