Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van duoc can snippets" » "van duc can snippets", "vat duoc can snippets", "tan duoc can snippets", "van duoc cac snippets", "van luoc can snippets", "van duoc ban 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 duoc can 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 duoc can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van duoc can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van duoc can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.