Perhaps you should try some spelling variations:
"thi dan sio2 snippets" » "thi bao sio2 snippets", "thi cao sio2 snippets", "thi dan so snippets", "thi doan sio2 snippets", "thi lan sio2 snippets", "thi dai sio2 snippets", "thi dan 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: (((("thi dan 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: (((("thi dan sio2 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi dan sio2 snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi dan sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.