Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van lap cong snippets" » "van tap cong snippets", "van lap dong snippets", "van luat cong snippets", "van lam cong snippets", "dan lap cong snippets", "van dap 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: (((("van lap 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: (((("van lap cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van lap cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van lap cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.