Perhaps you should try some spelling variations:
thieu tinh » chieu tinh, thien tinh, lieu tinh
trung tuan » trung thanh, trung tam, truong thanh
nhung cong » dung cong, thong cong, hang cong
tran tuan » tran xuan, tran quang, tran thanh
cong ban » cong bang, cong san, cong tan
ban hang » ngan hang
hang ca » hang va, nang cao, hang tai

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 (trieu tinh)) - thanh ((trung tuan) OR (tran tuan)) nhung cong ban hang ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu tinh) OR (trieu tinh)) - thanh ((trung tuan) OR (tran tuan)) nhung cong ban hang ca.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu tinh) or (trieu tinh)) - thanh ((trung tuan) OR (tran tuan)) nhung cong ban hang ca".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu tinh) or (trieu tinh)) - thanh ((trung tuan) OR (tran tuan)) nhung cong ban hang ca*.