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