Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vit ca cong snippets" » "vit cua cong snippets", "vit cac cong snippets", "vit cao cong snippets", "viet ca cong snippets", "viet 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: (((("vit ca 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: (((("vit ca cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vit ca cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vit ca cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.