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