Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van hanh hoe snippets" » "van thanh hoe snippets", "ban hanh hoe snippets", "van anh hoe snippets", "van hanh hoa snippets", "van hanh he snippets", "van thanh hoa 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: (((("van hanh 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: (((("van hanh hoe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hanh hoe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hanh hoe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.