Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri hoc den snippets" » "triet hoc den snippets", "tri thuc den snippets", "thai hoc den snippets", "tri hoc dan snippets", "tri hoc de snippets", "tri hoc hien 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: (((("tri hoc den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tri hoc den snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri hoc den snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri hoc den snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.