Perhaps you should try some spelling variations:
"cai cao sio2 snippets" » "cai bao sio2 snippets", "cai cao son snippets", "cai cao so snippets", "ca cao sio2 snippets", "cai tao sio2 snippets", "cay cao sio2 snippets", "cai cao sio2 slippers"
"python using a snippets" » "python using a slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("cai cao sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cai cao sio2 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cai cao sio2 snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cai cao sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.