Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dep hoi doan snippets" » "dep hoi dan snippets", "dep hoi doai snippets", "dep hoa doanh snippets", "dem hoi 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: (((("dep hoi 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: (((("dep hoi doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dep hoi doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dep hoi doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.