Perhaps you should try some spelling variations:
"trong noi cong snippets" » "trong noi code snippets", "trong nuoi cong snippets", "trong doi cong snippets", "trong moi cong snippets", "trong nguoi cong snippets", "trong tai cong snippets", "trong thi cong snippets"
"locating bug core snippets" » "locating bug code 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: (((("trong noi cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trong noi cong snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( trong noi cong snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trong noi cong snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.