Perhaps you should try some spelling variations:
"giang thi cac snippets" » "giang nhi cac snippets", "hoang thi cac snippets", "dang thi cac snippets", "giang thi cuc snippets", "giang tai cac snippets", "giang thi tac snippets"
"dung java java snippets" » "dung 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: (((("giang thi cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("giang thi cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( giang thi cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("giang thi cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.