Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"bat vien cac snippets" » "bat bien cac snippets", "bat dien cac snippets", "sat viec cac snippets", "bat vien bach snippets", "bat vien dai snippets", "bat vien da 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: (((("bat vien cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("bat vien cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( bat vien cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("bat vien cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.