Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi toan son snippets" » "chi toan son snippets", "ke toan son snippets", "bai toan son snippets", "khi toan von snippets", "khi tan son snippets", "khi hoang son 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: (((("khi toan son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi toan son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi toan son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi toan son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.