Perhaps you should try some spelling variations:
thuong con » thuong dong, truong cong, thong cong
ca thuong » cao thuong, cua thuong, va thuong
doan phan » doanh phan, toan phan, dan phan
doc hieu » toc thieu, hoc thieu, hoc hien
lang van » dang van, tang van, hoang van
con doan » cong doan, chan doan, cong hoan
van ca » van cau, van cua, dan ca

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (mot chieu)) sang - lang van ca thuong con doan phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (mot chieu)) sang - lang van ca thuong con doan phan tu*.