Perhaps you should try some spelling variations:
duong trong » dung trong
nhuong cong » nhung cong, luong cong, duong cong
chieu xanh » chieu sach, chieu sang, chieu tinh
tranh van » tran van, trinh van, thanh van
doan phan » doanh phan, toan phan, dan phan
ho chieu » theo chieu, hoc thieu, doi chieu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu xanh - canh tranh van ((nhuong cong) or (duong trong)) doan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - canh tranh van ((nhuong cong) OR (duong trong)) doan phan tu.
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - canh tranh van ((nhuong cong) or (duong trong)) doan phan tu*.