Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu ly doan snippets" » "hieu ky doan snippets", "lieu ly doan snippets", "hien ly doan snippets", "hieu ly doanh snippets", "hieu le doan snippets", "hieu ly don 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 ly doan 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 ly doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu ly doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu ly doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.