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