Perhaps you should try some spelling variations:
thuat trinh » thuat tinh, thuyet trinh, thuat trong
nhung cong » dung cong, thong cong, hang cong
qua nhung » quan nhung, cua nhung, qua chung
chu tinh » chau tinh, chua tinh, cuu tinh
anh tang » anh bang, anh dang, anh sang
anh nang » ganh nang, anh bang, anh dang
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: theo ((chu tinh) OR (thuat trinh)) - ((anh tang) OR (anh nang)) qua nhung cong dan toan cau~.
• Adding a wildcard symbol may retrieve word variants: theo ((chu tinh) or (thuat trinh)) - ((anh tang) or (anh nang)) qua nhung cong dan toan cau*.