Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"liu nin toan snippets" » "liu tinh toan snippets", "liu jin toan snippets", "liu ming toan snippets", "liu ying toan 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: (((("liu nin toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("liu nin toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( liu nin toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("liu nin toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.