Perhaps you should try some spelling variations:
chiet tach » chieu sach
trinh luan » trinh luat, trinh quan, trinh han
nhung cong » dung cong, thong cong, hang cong
doi chiet » doi chieu, doi chi, doi viet
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chiet tach - hanh ((trinh luan) or (tinh cua)) nhung cong dan ((toan tai) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh ((trinh luan) OR (tinh cua)) nhung cong dan ((toan tai) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh ((trinh luan) or (tinh cua)) nhung cong dan ((toan tai) or (van ban))*.