Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu bat don snippets" » "dieu bat don snippets", "hieu bai don snippets", "hieu luat don snippets", "hieu bat dong snippets", "hieu ba don snippets", "hieu bat 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: (((("hieu bat don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu bat don snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu bat don snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu bat don snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.