Perhaps you should try some spelling variations:
hang cong » dang cong, hang nong, bang cong
dung cua » dung luan
cong ban » cong bang, cong san, cong tan
ban toan » bai toan, ban than, van toan
toan cau » toan cao, toan ban, toan tap
ho lieu » so lieu, co lieu, ho chieu
ho kieu » so kieu, thi kieu, ho chieu

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) or (ho kieu)) tinh - thanh ((dung cua) OR (dung cho)) hang cong ban toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho lieu) OR (ho kieu)) tinh - thanh ((dung cua) OR (dung cho)) hang cong ban toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho lieu) or (ho kieu)) tinh - thanh ((dung cua) OR (dung cho)) hang cong ban toan cau".
• Adding a wildcard symbol may retrieve word variants: ((ho lieu) or (ho kieu)) tinh - thanh ((dung cua) OR (dung cho)) hang cong ban toan cau*.