Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
tung tuan » hung tuan, quang tuan, trang tuan
chi sach » chinh sach, chieu sach, co sach
cong sat » cong suat, cong san, cong hat
phan cau » phan dau, phan cac, phan lap
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi sach - thanh ((tung tuan) OR (trung tuan)) nhung cong sat ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi sach - thanh ((tung tuan) OR (trung tuan)) nhung cong sat ((phan cau) OR (phan tu)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chi sach - thanh ((tung tuan) OR (trung tuan)) nhung cong sat ((phan cau) or (phan tu))".
• Adding a wildcard symbol may retrieve word variants: doi chi sach - thanh ((tung tuan) OR (trung tuan)) nhung cong sat ((phan cau) or (phan tu))*.