Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung cap, dung cua
thanh cac » hanh cac, thanh bac, thanh ca
doc hieu » toc thieu, hoc thieu, hoc hien
cong ban » cong bang, cong san, cong tan
khan cap » khan ap, than cap, khoan cam

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 manh - thanh ((trung cua) OR (trung tuan)) nhung cong ban ((khan cap) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu manh - thanh ((trung cua) OR (trung tuan)) nhung cong ban ((khan cap) OR (thanh cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu manh - thanh ((trung cua) OR (trung tuan)) nhung cong ban ((khan cap) or (thanh cac))".
• Adding a wildcard symbol may retrieve word variants: doc hieu manh - thanh ((trung cua) OR (trung tuan)) nhung cong ban ((khan cap) or (thanh cac))*.