Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doi cong cho snippets" » "doi cong code snippets", "doi song cho snippets", "noi cong cho snippets", "moi cong cho snippets", "doi dong cho snippets", "doi cong co snippets", "doi rong cho 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 cong cho 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 cong cho snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doi cong cho snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi cong cho snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.