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