Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach cac chu snippets" » "sach cap chu snippets", "sach bac chu snippets", "sach dao chu snippets", "sach cac thu snippets", "sach cac che snippets", "sach cac khu 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: (((("sach cac chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("sach cac chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach cac chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach cac chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.