Perhaps you should try some spelling variations:
thinh sach » chinh sach, tinh sach, sinh sach
hanh trinh » canh tranh, hanh chinh
thang long » thanh cong
trinh cua » tinh cua, trinh luat, trinh quan
cua thang » cua hang, cua thanh, xua thang
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan
tien » tieng, bien, vien

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

• Performing a fuzzy search may retrieve terms with similar spellings: tien thinh sach - hanh trinh cua thang long ((tan toan) or (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tien thinh sach - hanh trinh cua thang long ((tan toan) OR (tap toan)) cau.
• Adding a wildcard symbol may retrieve word variants: tien thinh sach - hanh trinh cua thang long ((tan toan) or (tap toan)) cau*.