Perhaps you should try some spelling variations:
"thoi dai code snippets" » "hoc dai code snippets", "hoi dap code snippets", "hoi dan code snippets", "thoi dai de snippets", "thoi dai cong snippets", "thoi dai code 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"

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: (((("thoi dai code snippets") or ("python using a snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thoi dai code snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thoi dai code snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thoi dai code snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.