Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
hop hieu » hop nhieu, hoi hieu, hoc thieu
anh tang » anh dang, anh nang, anh sang
anh bang » anh hoang, anh quang, tinh bang
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan cau » phan cau, can cau, chinh cau

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: hop hieu lang - ((((anh tang) OR (anh bang))) OR (hanh trinh)) cua thong cong dan chan cau~.
• Adding a wildcard symbol may retrieve word variants: hop hieu lang - ((((anh tang) or (anh bang))) or (hanh trinh)) cua thong cong dan chan cau*.