Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
trinh toan » tinh toan, thanh toan, trinh han
anh dang » anh dong, anh bang, anh danh
anh dung » anh dong, anh huong, sach dung
van cong » van dong, van phong, phan cong
toan cao » toan ban, toan tap
cua van » cua ban, cua vat, cua dan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - ((anh dang) OR (anh dung)) cua van cong trinh toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - ((anh dang) or (anh dung)) cua van cong trinh toan cao~".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - ((anh dang) or (anh dung)) cua van cong trinh toan cao*.