Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"than tuan he snippets" » "thanh tuan he snippets", "tran tuan he snippets", "thanh xuan he snippets", "than quan he snippets", "than tuan le snippets", "than toan he 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: (((("than tuan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("than tuan he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( than tuan he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("than tuan he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.