Perhaps you should try some spelling variations:
hanh trang » thanh trung, hanh trinh, minh trang
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
nang cong » nang song, dang cong, bang cong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan tap » toan ban
va nang » van nang, da nang, cam 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 manh) OR (chieu sach)) - ((hanh trang) OR (canh tranh)) va nang cong san toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chieu sach)) - ((hanh trang) OR (canh tranh)) va nang cong san toan tap~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chieu sach)) - ((hanh trang) OR (canh tranh)) va nang cong san toan tap*.