Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tang luan » dung luan
thu minh » thi minh, chi minh, vu minh
tang cua » mang cua, hang cua, thong cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
chu han » chu van

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((thu minh) or (chu han)) - hanh ((tang cua) OR (tang luan)) nhung cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((thu minh) OR (chu han)) - hanh ((tang cua) OR (tang luan)) nhung cong san toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((thu minh) or (chu han)) - hanh ((tang cua) OR (tang luan)) nhung cong san toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((thu minh) or (chu han)) - hanh ((tang cua) OR (tang luan)) nhung cong san toan cau*.