Perhaps you should try some spelling variations:
"khoi can sio2 snippets" » "khoa can sio2 snippets", "khoi nang sio2 snippets", "hoc can sio2 snippets", "khoi cao sio2 snippets", "khoi bao sio2 snippets", "khoi can 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: (((("khoi can 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: (((("khoi can sio2 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi can sio2 snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi can sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.