Perhaps you should try some spelling variations:
hanh trang » thanh trung, hanh trinh, minh trang
chieu sach » chinh sach, chiet tach, chieu sang
nhung cong » dung cong, thong cong, hang cong
hieu quan » hieu qua, lieu quan, thien quan
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (hieu quan)) - ((hanh trang) OR (canh tranh)) va nhung cong dan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu quan)) - ((hanh trang) OR (canh tranh)) va nhung cong dan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (hieu quan)) - ((hanh trang) OR (canh tranh)) va nhung cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu quan)) - ((hanh trang) OR (canh tranh)) va nhung cong dan toan tap*.