Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
doanh cua » doanh luan
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu
manh cua » ban cua
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: ((doc hieu) OR (hoc hien)) tach - canh ((manh cua) or (doanh cua)) nhung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc hien)) tach - canh ((manh cua) OR (doanh cua)) nhung cong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) OR (hoc hien)) tach - canh ((manh cua) or (doanh cua)) nhung cong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) OR (hoc hien)) tach - canh ((manh cua) or (doanh cua)) nhung cong manh toan cau*.