Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
van toan » van tuan, van tan, van thanh
tap toan » tap doan, tap quan, bai toan
cho chu » cho thue

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo tieu) or (cho chu)) xanh - hanh tranh cua nhung cong ((van toan) or (tap toan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo tieu) OR (cho chu)) xanh - hanh tranh cua nhung cong ((van toan) OR (tap toan)) tap.
• Adding a wildcard symbol may retrieve word variants: ((theo tieu) or (cho chu)) xanh - hanh tranh cua nhung cong ((van toan) or (tap toan)) tap*.