Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc sach dan slippers" » "hoc sinh dan slippers", "hoc cac dan slippers", "hoc anh dan slippers", "hoc sach danh slippers", "hoc sach dao slippers", "hoc sach dat slippers", "hoc sach dan slippery", "hoc sach dan grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("hoc sach dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc sach dan slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc sach dan slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc sach dan slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.