Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tuan hon snippets" » "van quan hon snippets", "van ban hon snippets", "anh tuan hon snippets", "van tuan hoan snippets", "van tuan hoang snippets", "van tuan phong 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 tuan hon 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 tuan hon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tuan hon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tuan hon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.