Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
thiet dang » thien dang, nhiet dong, nhiet nang
hanh tranh » canh tranh, hanh trinh, hanh trang
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tranh cua » doanh cua, manh cua
van tuan » van quan, van ban, anh tuan
tuan cu » tuan tu, quan cua, tuan thu

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 dang - hanh tranh cua ((thuong cong) or (trong cong)) van tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet dang - hanh tranh cua ((thuong cong) OR (trong cong)) van tuan cu*.