Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trien kinh » tri kinh, trinh kinh, trien dich
tien manh » tien anh, tien thanh, tieng anh
tranh cua » doanh cua, manh cua
cua nhung » va nhung
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan

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 manh) or (trien kinh)) - canh tranh cua nhung cong ((tan toan) or (tap toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien manh) OR (trien kinh)) - canh tranh cua nhung cong ((tan toan) OR (tap toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((tien manh) or (trien kinh)) - canh tranh cua nhung cong ((tan toan) or (tap toan)) cau*.