Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dong luan can snippets" » "dong luan code snippets", "dung luan can snippets", "tong luan can snippets", "dong xuan can snippets", "dong luan van snippets", "dong luan san snippets", "dong luan han 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: (((("dong luan can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong luan can snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong luan can snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong luan can snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.