Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuc hanh o2 snippets" » "thuc hang o2 snippets", "thuc hanh noi snippets", "thuc hanh hoa snippets", "thu hanh o2 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: (((("thuc hanh 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: (((("thuc hanh o2 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuc hanh o2 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuc hanh o2 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.