Perhaps you should try some spelling variations:
nhung phuong » dung phuong, nhu phuong, truong phuong
chiet tach » chieu sach
hanh trinh » hanh chinh
nhung cong » dung cong, thong cong, hang cong
hoc chiet » hoc thiet, hoc nhiet, hoc hien
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 chiet tach - ((hanh trinh) OR (canh tranh)) cua ((nhung cong) or (nhung phuong)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - ((hanh trinh) OR (canh tranh)) cua ((nhung cong) OR (nhung phuong)) van toan ban*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - ((hanh trinh) OR (canh tranh)) cua ((nhung cong) or (nhung phuong)) van toan ban*".