Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hanh thang » nhanh thang, thanh thang, hanh trang
trinh toan » tinh toan, thanh toan, trinh han
theo chua » theo chu, ho chua, tho chu
cheo cua » cho cua, chuoi cua, co cua
thang va » hang va, trang va, thong va
toan cau » 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: ((theo chua) or (cheo cua)) tinh - hanh thang va nhung cong trinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chua) OR (cheo cua)) tinh - hanh thang va nhung cong trinh toan cau*.