Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
trung thuc » trong thuc, trang thuc, thuong thuc
trung tuan » trung thanh, trung tam, tran tuan
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
hoc chieu » hoc thieu, ho chieu, hoc hien
dung cong » dung trong
toan cau » toan cao, toan ban, toan tap

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 - hanh ((trung thuc) or (trung tuan)) dung cong thanh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - hanh ((trung thuc) OR (trung tuan)) dung cong thanh toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - hanh ((trung thuc) or (trung tuan)) dung cong thanh toan cau*.