Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hanh trang » thanh trung, canh tranh, minh trang
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » dang cong, hang nong, bang cong
cong tac » cong ty
tac tren » rac tren, tai tren, tap tren
tren tau » tren thuc, tren may, tren dat
va hang » van hang, va nang, va lang

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 ((hieu lang) OR (cuu tinh)) - ((hanh trang) OR (hanh trinh)) va hang cong tac tren tau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu lang) or (cuu tinh)) - ((hanh trang) OR (hanh trinh)) va hang cong tac tren tau~".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu lang) or (cuu tinh)) - ((hanh trang) OR (hanh trinh)) va hang cong tac tren tau*.