Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan viet ke snippets" » "phap viet ke snippets", "han viet ke snippets", "pham viet ke snippets", "phan viet ve snippets", "phan thiet ke snippets", "phan viet yen 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 viet ke 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 viet ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan viet ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan viet ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.