Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
trung tuan » trung thanh, trung tam, tran tuan
hieu manh » chieu xanh, hieu nganh, hien hanh
trung cua » truong cua, trung cap, dung cua
cong van » cong vang, cong san, song van
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu

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