Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
thiet hach » thien hach, thuyet hach, thiet hai
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cao thong » cao thuong, tao thong, giao thong
cao phong » cac phong, co phong, chau phong
nhung cau » chung cu, nhung bai, nhu cau
cong tac » cong ty
hang cau » hang dau, hang ca, nang cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet hach - thanh thuong ((cao thong) OR (cao phong)) cong tac ((hang cau) or (nhung cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet hach - thanh thuong ((cao thong) OR (cao phong)) cong tac ((hang cau) OR (nhung cau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet hach - thanh thuong ((cao thong) OR (cao phong)) cong tac ((hang cau) or (nhung cau))".
• Adding a wildcard symbol may retrieve word variants: hoc thiet hach - thanh thuong ((cao thong) OR (cao phong)) cong tac ((hang cau) or (nhung cau))*.