Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc duc doan snippets" » "hoc du doan snippets", "hoc duc hoan snippets", "hoc duc toan snippets", "hoc duoc doan snippets", "hoc nuoc doan snippets", "hoc thuc doan 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 duc doan 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 duc doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc duc doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc duc doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.