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