Perhaps you should try some spelling variations:
"tranh nhung cau snippets" » "trinh nhung cau snippets", "tranh hang cau snippets", "tran hung cau snippets", "tranh chung cu snippets", "tranh nhung bai snippets", "tranh nhu cau snippets"
"dung java java snippets" » "dung va 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: (((("tranh nhung cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tranh nhung cau snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tranh nhung cau snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tranh nhung cau snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.