Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thpt nam can snippets" » "thpt ham can snippets", "thpt lam can snippets", "thpt dan can snippets", "thpt nam dan snippets", "thpt nam cao snippets", "thpt nam cac snippets"
"locating bug code snippets" » "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: (((("thpt nam can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thpt nam can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thpt nam can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thpt nam can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.