Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao doan do snippets" » "cao doanh do snippets", "chan doan do snippets", "cho doanh do snippets", "cao doan o snippets", "cao toan do snippets", "cao doanh dao 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: (((("cao doan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao doan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao doan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao doan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.