Perhaps you should try some spelling variations:
thien danh » thien anh, thien dang, thien thanh
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat, trinh han
trinh cua » tinh cua, trinh luat, trinh luan
tong cong » trong cong, cong cong, dung cong
san thanh » ban thanh, van thanh, son thanh
thanh cac » hanh cac, thanh bac, thanh ca
cong san » cong tac

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thien danh) or (chieu sach)) - hanh ((trinh cua) OR (trinh quan)) tong cong san thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thien danh) OR (chieu sach)) - hanh ((trinh cua) OR (trinh quan)) tong cong san thanh cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thien danh) or (chieu sach)) - hanh ((trinh cua) OR (trinh quan)) tong cong san thanh cac".
• Adding a wildcard symbol may retrieve word variants: hoc ((thien danh) or (chieu sach)) - hanh ((trinh cua) OR (trinh quan)) tong cong san thanh cac*.