Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
phan tuong » phan thuong, phan truong, phan xuong
nhan dinh » nhan sinh, nhan tinh, nhat dinh
phan dinh » phan tich, xuan dinh, tran dinh
ho chieu » theo chieu, hoc thieu, doi chieu
cuu phan » cuu phat, cuu nhan, uu phan
dam cao » dam bao, dam rao, dao cao
nam cao » nam sao, nam giao

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 - ((nhan dinh) or (phan dinh)) cuu phan tuong ((dam cao) OR (nam cao)) cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((nhan dinh) OR (phan dinh)) cuu phan tuong ((dam cao) OR (nam cao)) cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((nhan dinh) or (phan dinh)) cuu phan tuong ((dam cao) OR (nam cao)) cap".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((nhan dinh) or (phan dinh)) cuu phan tuong ((dam cao) OR (nam cao)) cap*.