Perhaps you should try some spelling variations:
chieu tinh » trieu tinh, lieu tinh, chau tinh
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
doanh cua » doanh luan
manh cua » ban cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap

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

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