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