Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vat chau doc snippets" » "hat chau doc snippets", "vat chat doc snippets", "va chau doc snippets", "vat cau do snippets", "vat phau hoc 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: (((("vat chau doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vat chau doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vat chau doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vat chau doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.