Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
nong trong » cong trong, dong trong, nang trong
trung cua » truong cua, trung tuan, trung cap
cua nong » cua cong, cuu nong, cua dong
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: ho ((chieu xanh) or (chieu sach)) - thanh trung cua nong trong cac ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (chieu sach)) - thanh trung cua nong trong cac ((toan cao) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (chieu sach)) - thanh trung cua nong trong cac ((toan cao) or (van ban))*.