Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
cong toan » cong tan, cong hoan, cong tuan
quang cao » nang cao, quang nam
mang cua » manh cua, ban cua, cong cua
dung cua » dung luan, dung cho
quan cap » quan cau, quan lap, quan phap

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 ((mang cua) or (dung cua)) thuong cong toan ((quan cap) OR (quang cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((mang cua) OR (dung cua)) thuong cong toan ((quan cap) OR (quang cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chieu sach - hanh ((mang cua) or (dung cua)) thuong cong toan ((quan cap) OR (quang cao))".
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((mang cua) or (dung cua)) thuong cong toan ((quan cap) OR (quang cao))*.