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