Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
thang cua » thong cua, hang cua, than cua
dang cong » dung cong
ho chiet » ho thiet, hoc thiet, hoa thiet
ho chieu » theo chieu, hoc thieu, doi chieu
tang cua » mang cua, hang cua, tang luan
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 chiet) OR (ho chieu)) tach - hanh ((thang cua) or (tang cua)) dang cong trinh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho chieu)) tach - hanh ((thang cua) OR (tang cua)) dang cong trinh toan cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) OR (ho chieu)) tach - hanh ((thang cua) or (tang cua)) dang cong trinh toan cao*".