Perhaps you should try some spelling variations:
trinh trung » trinh truong, trinh trong, sinh trung
tinh doanh » kinh doanh, minh doanh, chinh doanh
trung cau » trung cap, trung ca, trung can
theo chu » theo chieu, cho chu, chao chu
chu sach » cau sach, thu sach, chieu sach
cua tong » cua dong, cua nong, cua song

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu sach - tinh doanh ((cua tong) or (cua cong)) cong trinh trung cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu sach - tinh doanh ((cua tong) OR (cua cong)) cong trinh trung cau.
• Adding a wildcard symbol may retrieve word variants: theo chu sach - tinh doanh ((cua tong) or (cua cong)) cong trinh trung cau*.