Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do tuan cau snippets" » "do toan cau snippets", "do quan cau snippets", "do tuan cu snippets", "do xuan cau snippets", "do quang cau 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: (((("do tuan cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("do tuan cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( do tuan cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do tuan cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.