Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"doi han cho snippets" » "doi han code snippets", "doi nhan cho snippets", "doi hanh cho snippets", "dai han cho snippets", "doi hang cho snippets", "doi han che snippets", "doi san 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 han 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 han cho snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( doi han cho snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi han cho snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.