Perhaps you should try some spelling variations:
cong thuong » hang thuong
thanh tung » thanh cong
thuong xen » thuong xuyen, thuong hien, thuong tren
hieu lang » chieu sang, hieu quang, nhieu tang
doi hieu » doi chieu, doc hieu, doi hien
tung cua » trung cua, tuong cua, dung cua
xen phan » dien phan, kenh phan, benh phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - thanh tung cua cong thuong xen phan dau~.
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - thanh tung cua cong thuong xen phan dau*.