Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ban viet cau snippets" » "san viet cau snippets", "bac viet cau snippets", "van viet cau snippets", "ban viet chau snippets", "ban viet ca snippets", "ban viet chu 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: (((("ban viet 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: (((("ban viet cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ban viet cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ban viet cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.