Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
truong cua » truong ca, truong quan, truong cao
trung tuan » trung thanh, trung tam, tran tuan
dung duong » dung dong, dong duong, dung dung
duong manh » duong van
manh toan » thanh toan, anh tuan, tinh toan
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) OR (chieu xanh)) - hanh ((truong cua) or (trung tuan)) dung duong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu xanh)) - hanh ((truong cua) OR (trung tuan)) dung duong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (chieu xanh)) - hanh ((truong cua) or (trung tuan)) dung duong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (chieu xanh)) - hanh ((truong cua) or (trung tuan)) dung duong manh toan cau*.