Perhaps you should try some spelling variations:
thieu tinh » trieu tinh, thien tinh, lieu tinh
chieu tinh » trieu tinh, lieu tinh, chau tinh
trung tuan » trung thanh, trung tam, tran tuan
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung cap, dung cua
cong san » cong tac
san phan » san pham, van phan, sat phan

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

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