Perhaps you should try some spelling variations:
phuong dung » thong dung, cuong dung, phuong hoang
chiet tach » chieu sach
hanh tranh » canh tranh, hanh trinh, hanh trang
nhung dung » ung dung, thong dung, trung dung
hien tach » thien hach, vien bach, hien hanh
tranh cua » doanh cua, manh cua
van toan » van tuan, van tan, van thanh
toan ban » van 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 ((hien tach) or (chiet tach)) - hanh tranh cua ((nhung dung) OR (phuong dung)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien tach) OR (chiet tach)) - hanh tranh cua ((nhung dung) OR (phuong dung)) van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien tach) or (chiet tach)) - hanh tranh cua ((nhung dung) OR (phuong dung)) van toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien tach) or (chiet tach)) - hanh tranh cua ((nhung dung) OR (phuong dung)) van toan ban*.