Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoi ca do snippets" » "doi ca do snippets", "cuoi cua do snippets", "nuoi cay do snippets", "duoi ca dao snippets", "duoi cau do snippets", "duoi cap do 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: (((("duoi ca 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: (((("duoi ca do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoi ca do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoi ca do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.