Perhaps you should try some spelling variations:
"trinh chao de snippets" » "trinh chat de snippets", "trinh han de snippets", "trinh co de snippets", "trinh cao de snippets", "trinh chat deo snippets", "trinh cham den snippets"
"hang java java snippets" » "hang va java 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: (((("hang java java snippets") or ("trinh chao de snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang java java snippets") OR ("trinh chao de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hang java java snippets ) or ( trinh chao de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang java java snippets") or ("trinh chao de snippets"))) or ("locating bug code snippets"))*.