Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
trung tuan » trung thanh, trung tam, tran tuan
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu

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 sang - thanh ((trung cua) or (trung tuan)) thong cong dan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh ((trung cua) OR (trung tuan)) thong cong dan phan cau*.