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