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
phuong lan » phuong la, thuong lan, phuong linh
lieu tinh » trieu tinh, diep tinh, bien tinh
trung cua » truong cua, trung tuan, trung cap
cua dung » cua dang, cua dong, qua dung
toan cau » toan ban, toan tap, toan tai
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: theo ((chieu sach) or (lieu tinh)) - thanh trung cua dung phuong lan ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (lieu tinh)) - thanh trung cua dung phuong lan ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (lieu tinh)) - thanh trung cua dung phuong lan ((toan cau) or (toan cao))*.