Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi cua tom snippets" » "chi cua tom snippets", "thai cua tom snippets", "khi cua tam snippets", "khi cua toi snippets", "khi cua toc 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 cua tom 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 cua tom snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khi cua tom snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi cua tom snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.