Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
chiet tach » chieu sach
hanh trinh » canh tranh, hanh chinh
hieu manh » chieu xanh, hieu nganh, dieu hanh
luan dung » lan dung, luan dong, luan hung
dung cong » dung trong
cong san » cong tac
san toan » van toan, dan toan, 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: hoc ((hieu manh) or (chiet tach)) - ((hanh trang) OR (hanh trinh)) luan dung cong san toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chiet tach)) - ((hanh trang) OR (hanh trinh)) luan dung cong san toan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu manh) or (chiet tach)) - ((hanh trang) OR (hanh trinh)) luan dung cong san toan tap*".