Perhaps you should try some spelling variations:
thien thanh » tien thanh, thi thanh, hien hanh
thanh trung » thanh tung
thien hach » hien hanh
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, nhung don
doanh phan » doanh nhan, doan phan, doanh thanh
hang cong » dang cong, hang nong, bang cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien hach) OR (thien thanh)) - thanh trung tuan ((nhung cong) or (hang cong)) doanh phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien hach) OR (thien thanh)) - thanh trung tuan ((nhung cong) OR (hang cong)) doanh phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien hach) OR (thien thanh)) - thanh trung tuan ((nhung cong) or (hang cong)) doanh phan tu".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien hach) OR (thien thanh)) - thanh trung tuan ((nhung cong) or (hang cong)) doanh phan tu*.