Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi quan cua snippets" » "moi quan cua snippets", "do quan cua snippets", "noi quan cua snippets", "doi quan luan snippets", "doi ban cua snippets", "doi gian cua 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: (((("doi quan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi quan cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi quan cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi quan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.