Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc khoi da snippets" » "hoc khoa da snippets", "hoc hoa da snippets", "hoc noi da snippets", "hoc khoi dau snippets", "hoc khoi de snippets", "hoc khoi va 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: (((("hoc khoi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc khoi da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc khoi da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc khoi da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.