Perhaps you should try some spelling variations:
"dan hanh code snippets" » "dan hanh de snippets", "dan hanh cong snippets", "dan hanh cad snippets", "dang hanh code snippets", "dan khanh code snippets", "dan thanh code snippets", "dan hanh 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: (((("dan hanh 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: (((("dan hanh code snippets") OR ("python using a snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan hanh code snippets ) or ( python using a snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan hanh code snippets") or ("python using a snippets"))) or ("locating bug code snippets"))*.