Perhaps you should try some spelling variations:
"quoc trinh sio2 snippets" » "quoc thinh sio2 snippets", "qua trinh sio2 snippets", "quy trinh sio2 snippets", "quoc trinh sinh snippets", "quoc trinh iot snippets", "quoc trinh 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: (((("quoc trinh 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: (((("quoc trinh sio2 snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc trinh sio2 snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc trinh sio2 snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.