Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tran hai doc snippets" » "tran bai doc snippets", "tran chau doc snippets", "tran nhat doc snippets", "tran hai huoc snippets", "tran than doc 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 hai doc 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 hai doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran hai doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran hai doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.