Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thpt nho cao snippets" » "thpt khoa cao snippets", "thpt nam cao snippets", "thpt chu cao snippets", "thpt nha cao snippets", "thpt cho cao snippets", "thpt nho vao 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 nho cao 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 nho cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thpt nho cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thpt nho cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.