Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoe men hoc snippets" » "khoe moi hoc snippets", "kho me hoc snippets", "khoe ban hoc snippets", "khoe mon hoc snippets", "khoe den hoc snippets", "khoe benh 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: (((("khoe men 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: (((("khoe men hoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoe men hoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoe men hoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.