Perhaps you should try some spelling variations:
"nha thuoc code snippets" » "nha thuoc co snippets", "nha thuoc cong snippets", "nha nuoc code snippets", "nhan thuc code snippets", "nha hoc code snippets", "nha thuoc 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 ("nha thuoc 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 ("nha thuoc code snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using a snippets ) or ( nha thuoc code snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using a snippets") or ("nha thuoc code snippets"))) or ("locating bug code snippets"))*.