Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"voi cau cong snippets" » "voi cac cong snippets", "voi cuu cong snippets", "voi cao cong snippets", "voi can cong snippets", "hoi cau cong 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: (((("voi cau cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("voi cau cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( voi cau cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("voi cau cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.