Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
thien quan » trien quang, lien quan, thien van
hieu quan » hieu qua, lieu quan, lien quan
hang cong » dang cong, hang nong, bang cong
trang va » tran van, hang va
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban
va hang » van hang, va nang, va lang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu quan) OR (thien quan)) - hanh trang va hang cong van toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu quan) OR (thien quan)) - hanh trang va hang cong van toan ban".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu quan) OR (thien quan)) - hanh trang va hang cong van toan ban*.