Perhaps you should try some spelling variations:
"duoc luan code snippets" » "duoc luan cong snippets", "duoc luan che snippets", "duoc luan de snippets", "nuoc luan code snippets", "duoc luat code snippets", "thuoc luan code snippets", "duoc luan 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: (((("python using a snippets") or ("duoc luan code snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using a snippets") OR ("duoc luan code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using a snippets ) or ( duoc luan code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using a snippets") or ("duoc luan code snippets"))) or ("locating bug code snippets"))*.