Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sang » chieu sach, chieu xanh, hieu lang
chiet tach » chieu sach
trung cua » truong cua, trung tuan, trung cap
cong tap » cuong tap, cong tan, tong tap
cong tac » cong ty
quan cau » quang cao, toan cau, quan ha

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 (chiet tach)) - thanh trung cua ban ((cong tap) OR (cong tac)) quan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sang) OR (chiet tach)) - thanh trung cua ban ((cong tap) OR (cong tac)) quan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sang) or (chiet tach)) - thanh trung cua ban ((cong tap) OR (cong tac)) quan cau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sang) or (chiet tach)) - thanh trung cua ban ((cong tap) OR (cong tac)) quan cau*.