Perhaps you should try some spelling variations:
tong thuong » thong thuong, trong thuong, cong thuong
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
ben phan » benh phan, bon phan, benh nhan
xen phan » dien phan, kenh phan, benh phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - thanh ((trung cua) OR (trung cap)) tong thuong ((ben phan) or (xen phan)) dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh ((trung cua) OR (trung cap)) tong thuong ((ben phan) OR (xen phan)) dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - thanh ((trung cua) OR (trung cap)) tong thuong ((ben phan) or (xen phan)) dau".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - thanh ((trung cua) OR (trung cap)) tong thuong ((ben phan) or (xen phan)) dau*.