Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh trinh » hanh chinh
lieu tinh » trieu tinh, diep tinh, bien tinh
cua nhung » va nhung
dan toan » dan than, manh toan, xuan toan
van toan » van tuan, van tan, van thanh
ho lieu » so lieu, co lieu, ho kieu

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

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