Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan thi cao snippets" » "pham thi cao snippets", "tran thi cao snippets", "phan tu cao snippets", "phan thai cao snippets", "phan thi hao snippets", "phan thi bao 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: (((("phan thi cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phan thi cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan thi cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan thi cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.