Perhaps you should try some spelling variations:
"dong trinh cac snippets" » "cong trinh cac snippets", "dong tinh cac snippets", "dong tranh cac snippets", "dong trinh cau snippets", "dong trinh chat snippets", "dong trinh chao snippets"
"duong va java snippets" » "duong van java snippets", "dung va java snippets", "luong va java snippets", "duong java 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: (((("duong va java snippets") or ("dong trinh cac snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong va java snippets") OR ("dong trinh cac snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong va java snippets ) or ( dong trinh cac snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong va java snippets") or ("dong trinh cac snippets"))) or ("locating bug code snippets"))*.