Perhaps you should try some spelling variations:
khong tang » khong cang, khong thanh, khong trong
chieu sach » chinh sach, chiet tach, chieu sang
canh manh » lanh manh, canh tranh, cach mang
cua khong » hua khong, cua phuong, cua thuong
ho chieu » theo chieu, hoc thieu, doi chieu
manh cua » doanh cua, ban cua
tang dan » tang van, tung dan, tang luan
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh manh cua khong tang dan ((toan cau) OR (toan tap))~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh manh cua khong tang dan ((toan cau) or (toan tap))*.