Perhaps you should try some spelling variations:
"dong trinh chao snippets" » "dong trinh code snippets", "cong trinh chao snippets", "dong tinh chao snippets", "dong tranh chao snippets", "dong trinh chat snippets", "dong trinh han snippets", "dong trinh co 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: (((("dong trinh chao 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 trinh chao snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dong trinh chao snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong trinh chao snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.