Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoi viet chu snippets" » "hai viet chu snippets", "oi viet chu snippets", "thai viet chu snippets", "hoi viet chau snippets", "hoi viet cho snippets", "hoi viet cau 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: (((("hoi viet chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoi viet chu snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoi viet chu snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoi viet chu snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.