Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dat dau doan snippets" » "dat du doan snippets", "dat dao doanh snippets", "dat tap doan snippets", "dat dai doan snippets", "bat dau doan snippets", "dat cau doan 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: (((("dat dau 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: (((("dat dau doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dat dau doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dat dau doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.