Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duc quoc can snippets" » "duc suc can snippets", "cua quoc can snippets", "duc ngoc can snippets", "duc quoc chan snippets", "duc luoc can snippets", "duc quoc 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: (((("duc quoc 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: (((("duc quoc can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duc quoc can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duc quoc can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.