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