Perhaps you should try some spelling variations:
hanh thang » nhanh thang, thanh thang, hanh trang
hieu quan » lieu quan, thien quan, lien quan
thang da » thang va, tang da, thanh dat
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan cau » toan cao, toan ban, toan tap
da nang » cam nang, kha nang, cao nang

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 ((hieu quan) OR (hieu qua)) - hanh thang da nang ((cong tan) OR (cong san)) toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu quan) or (hieu qua)) - hanh thang da nang ((cong tan) OR (cong san)) toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu quan) or (hieu qua)) - hanh thang da nang ((cong tan) OR (cong san)) toan cau*.