Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
trinh hoan » trinh hoa, trinh toan, trinh chuan
nhung cong » dung cong, thong cong, hang cong
trinh han » trinh quan
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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 ((trinh hoan) OR (trinh han)) nhung cong dan than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((trinh hoan) OR (trinh han)) nhung cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((trinh hoan) OR (trinh han)) nhung cong dan than cau*.