Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hien manh » hien hanh, tien manh, hien nhanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
ca thuong » cao thuong, cua thuong, va thuong
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien manh) OR (hieu manh)) - hanh trang ((cua cong) or (ca thuong)) cong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien manh) OR (hieu manh)) - hanh trang ((cua cong) OR (ca thuong)) cong tap toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien manh) OR (hieu manh)) - hanh trang ((cua cong) or (ca thuong)) cong tap toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien manh) OR (hieu manh)) - hanh trang ((cua cong) or (ca thuong)) cong tap toan cao*.