Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"giang thi cac snippets" » "giang thi code 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"

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 core 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 core snippets")).
• Removing quotes may allow a broader search: (((( giang thi cac snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("giang thi cac snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.