Perhaps you should try some spelling variations:
nhung cuong » nhung cong, hung cuong, nhung chong
hanh tranh » canh tranh, hanh trinh, hanh trang
cuong tap » luong tap, cong tac, luong tai
chi hanh » chi nhanh, chi thanh, chi anh
thi hanh » thi thanh
tranh va » tranh van, trang va, trinh va
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: doi ((chi hanh) OR (thi hanh)) - hanh tranh va nhung cuong tap toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chi hanh) OR (thi hanh)) - hanh tranh va nhung cuong tap toan cao".
• Adding a wildcard symbol may retrieve word variants: doi ((chi hanh) OR (thi hanh)) - hanh tranh va nhung cuong tap toan cao*.