Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
trinh han » trinh quan
ho chieu » theo chieu, hoc thieu, doi chieu
tung hay » cung hay, tung bay, trung hai
han cau » hang cau, phan cau, van cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chieu sach - thanh tung hay ((hang cong) or (dang cong)) trinh han cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh tung hay ((hang cong) OR (dang cong)) trinh han cau.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh tung hay ((hang cong) or (dang cong)) trinh han cau*.