Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
cong quang » luong quang, thong quang, duong quang
cong ngang » cong nhan, cong lang, cong nong
tam nhung » tham nhung, cam nhung, nam nhung
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: ho ((chieu sach) OR (chiet tach)) - thanh trung tam nhung ((cong quang) or (cong ngang)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chiet tach)) - thanh trung tam nhung ((cong quang) OR (cong ngang)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) OR (chiet tach)) - thanh trung tam nhung ((cong quang) or (cong ngang)) phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) OR (chiet tach)) - thanh trung tam nhung ((cong quang) or (cong ngang)) phan cau*.