Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung tuan » trung thanh, trung tam, tran tuan
tuan trong » thuan trong, quan trong, tran trong
trong nong » trong cong
nong doanh » dong doanh, rong doanh, trong doanh
hieu sach » chieu sach, hieu cach, hieu cac
dien sach » dien anh
phan cau » phan dau, phan cac, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sach) or (dien sach)) - thanh trung tuan trong nong doanh ((phan cau) or (phan tu))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sach) OR (dien sach)) - thanh trung tuan trong nong doanh ((phan cau) OR (phan tu)).
• Adding a wildcard symbol may retrieve word variants: doc ((hieu sach) or (dien sach)) - thanh trung tuan trong nong doanh ((phan cau) or (phan tu))*.