Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hanh tranh » canh tranh, hanh trinh, hanh trang
lieu tinh » trieu tinh, diep tinh, bien tinh
tranh cua » doanh cua, manh cua
dung cong » dung trong
doi lieu » duoc lieu, doi chieu, du lieu
van toan » van tuan, van tan, van thanh
hai quan » tac quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi lieu tinh - hanh tranh cua ((nhung cong) OR (dung cong)) ((van toan) or (hai quan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi lieu tinh - hanh tranh cua ((nhung cong) OR (dung cong)) ((van toan) OR (hai quan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi lieu tinh - hanh tranh cua ((nhung cong) OR (dung cong)) ((van toan) or (hai quan)) cau".
• Adding a wildcard symbol may retrieve word variants: doi lieu tinh - hanh tranh cua ((nhung cong) OR (dung cong)) ((van toan) or (hai quan)) cau*.