Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran doan de snippets" » "trang doan de snippets", "tan doan de snippets", "tran hoan de snippets", "tran dan de snippets", "tran doan do snippets", "tran toan de 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 doan de 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 doan de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran doan de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran doan de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.