Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doi cao chu snippets" » "doi cao code snippets", "do cao chu snippets", "doi co chu snippets", "doc cao chu snippets", "doi chao chu snippets", "doi cao cho snippets", "doi cho chu snippets"
"python using java snippets" » "python using data 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 cao chu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi cao chu snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doi cao chu snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi cao chu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.