Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"yang xu cao snippets" » "lang xu cao snippets", "yan xu cao snippets", "yang yu cao snippets", "yang cu cao snippets", "yang vu cao snippets", "yang su cao 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: (((("yang xu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("yang xu cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( yang xu cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("yang xu cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.