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