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
quang cao » nang cao, quang nam
mang vua » mang cua, hang va, bang va
cong tan » cong tac, cong san, cong thanh
quan cap » quan cau, quan lap, quan phap
mang va » hang va, bang va, dang va

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 va) or (mang vua)) thuong cong tan ((quan cap) or (quang cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - hanh ((mang va) OR (mang vua)) thuong cong tan ((quan cap) OR (quang cao)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - hanh ((mang va) or (mang vua)) thuong cong tan ((quan cap) or (quang cao))*.