Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi xet cong snippets" » "doi xuat cong snippets", "doi te cong snippets", "doi ve cong snippets", "doi met cong snippets", "doi viet cong 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: (((("doi xet cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doi xet cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi xet cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi xet cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.