Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
tien thanh » tran thanh, den thanh
cua thuong » cua truong, cua phuong, ca thuong
hanh tang » hanh trang, anh tang, hanh mang
tang cua » mang cua, hang cua, tang luan
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien thanh) or (tien thinh)) - hanh tang cua thuong cong ((van toan) OR (van tan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien thanh) OR (tien thinh)) - hanh tang cua thuong cong ((van toan) OR (van tan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien thanh) or (tien thinh)) - hanh tang cua thuong cong ((van toan) OR (van tan)) ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien thanh) or (tien thinh)) - hanh tang cua thuong cong ((van toan) OR (van tan)) ban*.