Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
thiet danh » thien danh, thien anh, thien dang
trung tuan » trung thanh, trung tam, tran tuan
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung cap, dung cua
nhanh cau » nhanh cay, thanh chau, nhanh ha
cong dan » cong san, cong tan, huong dan
hanh cau » hang cau, hanh cac, hanh cat

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet danh - thanh ((trung cua) or (trung tuan)) thuong cong dan ((hanh cau) OR (nhanh cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet danh - thanh ((trung cua) OR (trung tuan)) thuong cong dan ((hanh cau) OR (nhanh cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet danh - thanh ((trung cua) or (trung tuan)) thuong cong dan ((hanh cau) OR (nhanh cau))".
• Adding a wildcard symbol may retrieve word variants: hoc thiet danh - thanh ((trung cua) or (trung tuan)) thuong cong dan ((hanh cau) OR (nhanh cau))*.