Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ngo ca snippets" » "van ngoc ca snippets", "van nga ca snippets", "ban ngo ca snippets", "van ngo cua snippets", "van ngo ha snippets", "van ngo va 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 ngo ca 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 ngo ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ngo ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ngo ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.