Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran tuan do snippets" » "tran xuan do snippets", "tran quang do snippets", "tran thanh do snippets", "tran toan do snippets", "tran truan doi snippets", "tran 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: (((("tran 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: (((("tran tuan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran tuan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran tuan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.