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