Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao tang ct1 snippets" » "cao dang ct1 snippets", "cao tang ct4 snippets", "cao tang ct5 snippets", "cao tang ct8 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: (((("cao tang ct1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao tang ct1 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao tang ct1 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao tang ct1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.