Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
tuan trong » thuan trong, quan trong, tran trong
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » toc thieu, hoc hien
toan tuan » tran tuan, toan quan, doan tuan
thanh chu » thanh chau, thanh cha, thanh thu
than cap » khan cap, thanh lap, thanh cac

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 - tinh toan tuan trong cong thanh ((thanh chu) or (than cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - tinh toan tuan trong cong thanh ((thanh chu) OR (than cap))*.