Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao minh o2 snippets" » "chi minh o2 snippets", "van minh o2 snippets", "cao minh hoa snippets", "cao minh son snippets", "cao minh hon 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 minh o2 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 minh o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao minh o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao minh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.