Perhaps you should try some spelling variations:
trinh toan » tinh toan, thanh toan, trinh han
lieu tinh » trieu tinh, diep tinh, bien tinh
chau tinh » cuu tinh, ha tinh, cua tinh
chinh tai » chinh tri
dang cong » dung cong
chinh va » chinh ta, hanh va, tinh va
toan cau » toan cao, toan ban, toan tap

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: ho ((lieu tinh) OR (chau tinh)) - hanh ((chinh va) OR (chinh tai)) dang cong trinh toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((lieu tinh) or (chau tinh)) - hanh ((chinh va) OR (chinh tai)) dang cong trinh toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((lieu tinh) or (chau tinh)) - hanh ((chinh va) OR (chinh tai)) dang cong trinh toan cau*.