Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hau van toi snippets" » "chau van toi snippets", "khau van toi snippets", "ha van toi snippets", "hau van tai snippets", "hau van thi snippets", "hau van 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: (((("hau van toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hau van toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hau van toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hau van toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.