Perhaps you should try some spelling variations:
nhung xuong » nhung huong, nhung tuong, nhung phuong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tang luan » dung luan
xuong dan » huong dan, xuong san, tuong dan
tang cua » mang cua, hang cua, thong cua
toan cau » toan cao, toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu sach - hanh ((tang cua) or (tang luan)) nhung xuong dan ((toan cau) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((tang cua) OR (tang luan)) nhung xuong dan ((toan cau) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((tang cua) or (tang luan)) nhung xuong dan ((toan cau) or (van ban))*.