Perhaps you should try some spelling variations:
trung cong » truong cong, trong cong, trung uong
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua trung » cua truong, xuan trung, cua nhung
doc hieu » toc thieu, hoc thieu
cong tap » cuong tap, cong tac, cong tan
tap doan » tap quan
doan tap » toan tap, doan cap, doanh tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc hieu) or (hoc hien)) xanh - hanh tranh cua trung cong tap doan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) xanh - hanh tranh cua trung cong tap doan tap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc hien)) xanh - hanh tranh cua trung cong tap doan tap*.