Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"doi cuong do snippets" » "dai cuong do snippets", "doi tuong do snippets", "doi cong do snippets", "doi cuong dao snippets", "doi cuong vo snippets", "doi luong do 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: (((("doi cuong 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: (((("doi cuong do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doi cuong do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi cuong do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.