Perhaps you should try some spelling variations:
quan thanh » van thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
thong cong » trong cong, tong cong, thong thong
thuong con » thuong dong, truong cong, thuong chi
ban thanh » ban hanh, ban hang
tranh cua » doanh cua, manh cua
san toan » van toan, dan toan, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((quan thanh) or (ban thanh)) - hanh tranh cua ((thong cong) or (thuong con)) san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((quan thanh) OR (ban thanh)) - hanh tranh cua ((thong cong) OR (thuong con)) san toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((quan thanh) or (ban thanh)) - hanh tranh cua ((thong cong) or (thuong con)) san toan tap*.