Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuc vien he snippets" » "thuc hien he snippets", "thuc tien he snippets", "thuc viet he snippets", "thuc dien he snippets", "thuc trien he snippets", "thuc thien he 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 vien he 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 vien he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuc vien he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuc vien he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.