Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ly hoan snippets" » "van ly hoa snippets", "van ly hoat snippets", "van ly toan snippets", "van ky hoan snippets", "van le hoan snippets", "van lu hoan 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 ly hoan 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 ly hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ly hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ly hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.