Perhaps you should try some spelling variations:
"dong thi tran snippets" » "duong thi tran snippets", "dang thi tran snippets", "dong tai tran snippets", "dong thi trang snippets", "dong thi thanh snippets", "dong thi lan snippets", "dong thi tran slippers"
"dang va java snippets" » "dang van java snippets", "dang vat java snippets", "hang va java snippets", "dang java java snippets", "dang va java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("dang va java snippets") or ("dong thi tran snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang va java snippets") OR ("dong thi tran snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang va java snippets ) or ( dong thi tran snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang va java snippets") or ("dong thi tran snippets"))) or ("locating bug code snippets"))*.