Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, trung cap
hang cong » dang cong, hang nong, bang cong
cua hang » cua dang, cua nhung, cua cong
cong dan » cong san, cong tan, huong dan
phan cau » phan cac, phan tu, phan lap
phan dau » phan tu, hang dau

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

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