Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tong luan cu snippets" » "tang luan cu snippets", "dung luan cu snippets", "hang luan cu snippets", "tong tuan cu snippets", "tong luan chi snippets", "tong quan cua 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: (((("tong luan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tong luan cu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tong luan cu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tong luan cu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.