Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trung tuan » trung thanh, trung tam, tran tuan
trung cua » truong cua, trung cap, dung cua
bang cong » dang cong, bang song, hang cong
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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

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