Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc sach te snippets" » "hoc sinh te snippets", "hoc cac te snippets", "hoc anh te snippets", "hoc sach tet snippets", "hoc sach de snippets", "hoc sach tu 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 sach te 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 sach te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc sach te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc sach te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.