Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"don minh mot snippets" » "doan minh mot snippets", "do minh mot snippets", "don tinh mot snippets", "don dinh moi snippets", "don minh hoa snippets", "don minh son 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: (((("don minh mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("don minh mot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( don minh mot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("don minh mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.