Perhaps you should try some spelling variations:
tien thanh » tien thinh, tran thanh, den thanh
dang cong » dung cong
bang cua » mang cua, hang cua, tang cua
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cau » toan cao, toan ban, toan tap
ban cua » ban quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((tien thanh) or (tieng anh)) - anh ((bang cua) OR (ban cua)) dang cong san toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien thanh) OR (tieng anh)) - anh ((bang cua) OR (ban cua)) dang cong san toan cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien thanh) or (tieng anh)) - anh ((bang cua) OR (ban cua)) dang cong san toan cau*".