Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"than hoc ca snippets" » "toan hoc ca snippets", "thai hoc ca snippets", "than doc ca snippets", "than hoc cao snippets", "than hoc cua snippets", "than hoc cac 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 ca 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 ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( than hoc ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("than hoc ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.