Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, cong tan
tang luan » dung luan
dang cong » dung cong
tang cua » mang cua, hang cua, thong cua
tran cao » tran chau, trang cho, tranh cac
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: theo chieu sach - hanh ((tang cua) or (tang luan)) dang cong thanh ((tran cao) OR (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((tang cua) OR (tang luan)) dang cong thanh ((tran cao) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((tang cua) or (tang luan)) dang cong thanh ((tran cao) OR (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((tang cua) or (tang luan)) dang cong thanh ((tran cao) OR (toan cao))*.