Perhaps you should try some spelling variations:
chiet tach » chieu sach
trinh quan » tinh quang, trinh luat, trinh han
nhung cong » dung cong, thong cong, hang cong
doi chiet » doi chieu, doi chi, doi viet
trinh cua » trinh luat, trinh luan, trinh chat
tinh cua » sinh cua, tinh chat, tranh cua
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: doi chiet tach - hanh ((((trinh cua) or (trinh quan))) or (tinh cua)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chiet tach - hanh ((((trinh cua) OR (trinh quan))) OR (tinh cua)) nhung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: doi chiet tach - hanh ((((trinh cua) or (trinh quan))) or (tinh cua)) nhung cong dan toan cau*.