Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhan phan ve snippets" » "than phan ve snippets", "nhan chan ve snippets", "phan phan ve snippets", "nhan phan le snippets", "nhan phan va snippets", "nhan pha ve 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: (((("nhan phan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhan phan ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhan phan ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhan phan ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.