Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
trinh quan » tinh quang, trinh luat, trinh han
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
trinh cua » tinh cua, trinh luat, trinh luan
ban cong » bang cong, van cong, phan cong
toan tap » 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 ((chieu sach) or (chinh sach)) - hanh ((trinh cua) OR (trinh quan)) ban cong thanh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (chinh sach)) - hanh ((trinh cua) OR (trinh quan)) ban cong thanh toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (chinh sach)) - hanh ((trinh cua) OR (trinh quan)) ban cong thanh toan tap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (chinh sach)) - hanh ((trinh cua) OR (trinh quan)) ban cong thanh toan tap*.