Perhaps you should try some spelling variations:
thanh trung » thanh tung
dung phuong » dung thuong, bang phuong, dung chung
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
phuong lan » phuong la, thuong lan, phuong linh
trung cua » truong cua, trung tuan, trung cap
cua dung » cua dang, cua dong, qua dung
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (chieu tinh)) - thanh trung cua dung phuong lan ((toan cau) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu tinh)) - thanh trung cua dung phuong lan ((toan cau) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu tinh)) - thanh trung cua dung phuong lan ((toan cau) or (toan tap))*.