Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
trung tuan » trung thanh, tran tuan, truong thanh
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
cong manh » cong danh, duong manh, cong thanh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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