Perhaps you should try some spelling variations:
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
tranh cua » doanh cua, manh cua
dang cong » dung cong
khang cau » khang cu, khang chan, nhung cau
hang cau » hang dau, hang ca, nhung cau

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 - canh tranh cua ((nhung cong) or (dang cong)) quang ((khang cau) OR (hang cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - canh tranh cua ((nhung cong) OR (dang cong)) quang ((khang cau) OR (hang cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - canh tranh cua ((nhung cong) or (dang cong)) quang ((khang cau) OR (hang cau))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - canh tranh cua ((nhung cong) or (dang cong)) quang ((khang cau) OR (hang cau))*.