Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
thong dan » thong van, tuong dan, thong den
tong dan » tuong dan, trong dan, cong dan
cua han » cua hang, cua nhan, cua phan
hanh tu » anh tu, danh tu

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 tranh cua han ((tong dan) OR (thong dan)) hanh tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nhanh - hanh tranh cua han ((tong dan) OR (thong dan)) hanh tu".
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh tranh cua han ((tong dan) OR (thong dan)) hanh tu*.