Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khai thac so snippets" » "khai tac so snippets", "khai than so snippets", "khai thuc so snippets", "khac thac so snippets", "hai thac so snippets", "thai thac so 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: (((("khai thac so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khai thac so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khai thac so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khai thac so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.