Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
trung tuan » trung thanh, trung tam, tran tuan
thanh toan » thanh hoa, thanh san, tinh toan
hoc thieu » toc thieu, hoc hien
trung cua » truong cua, trung cap, dung cua
hang cong » dang cong, hang nong, bang cong

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