Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khai hat de snippets" » "khai hai de snippets", "thai hat de snippets", "khai thac de snippets", "khai nhat de snippets", "khai vat de snippets", "khai dat de 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 hat de 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 hat de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khai hat de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khai hat de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.