Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu xanh, hieu lang, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
trung cao » truong cao, trung cap, trung co
dung cong » dung trong
thanh cac » hanh cac, thanh bac, thanh ca
cao dung » cao dang, cao dong, cao ung
cong ban » cong bang, cong san, cong tan
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chieu sang) OR (chieu sach)) - thanh trung cao dung cong ban ((phan cau) or (thanh cac))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chieu sach)) - thanh trung cao dung cong ban ((phan cau) OR (thanh cac)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) OR (chieu sach)) - thanh trung cao dung cong ban ((phan cau) or (thanh cac))".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) OR (chieu sach)) - thanh trung cao dung cong ban ((phan cau) or (thanh cac))*.