Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trang » thanh trung, canh tranh, hanh trinh
thong cong » trong cong, tong cong, thong thong
trang cua » tranh cua, tang cua, trung cua
cua thong » cua thuong, cua khong, cua tong
tac toan » tam toan, hach toan, tich toan
tap toan » tap doan, tap quan, bai toan

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 nhanh - hanh trang cua thong cong ((tac toan) OR (tap toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - hanh trang cua thong cong ((tac toan) OR (tap toan)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh trang cua thong cong ((tac toan) OR (tap toan)) cau*.