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