Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van cao code snippets" » "van cao cong snippets", "van cao de snippets", "van cfd code snippets", "van dao code snippets", "van bao code snippets", "van cau code snippets"
"locating bug code slippers" » "locating bung code slippers", "locating bugs code slippers"

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: (((("van cao code snippets") or ("python using java snippets"))) or ("locating bug code slippers"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van cao code snippets") OR ("python using java snippets"))) OR ("locating bug code slippers")).
• Removing quotes may allow a broader search: (((( van cao code snippets ) or ( python using java snippets ))) or ( locating bug code slippers )).
• Adding a wildcard symbol may retrieve word variants: (((("van cao code snippets") or ("python using java snippets"))) or ("locating bug code slippers"))*.