Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu sach » chinh sach, chieu sang, chieu xanh
trung cua » truong cua, trung tuan, trung cap
nong cong » tong cong, nang cong, dong cong
cong cong » cong dong, trong cong, dung cong
hach toan » thanh toan, manh 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: ho ((chiet tach) or (chieu sach)) - thanh trung cua ((nong cong) OR (cong cong)) hach toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chiet tach) OR (chieu sach)) - thanh trung cua ((nong cong) OR (cong cong)) hach toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chiet tach) or (chieu sach)) - thanh trung cua ((nong cong) OR (cong cong)) hach toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chiet tach) or (chieu sach)) - thanh trung cua ((nong cong) OR (cong cong)) hach toan cau*.