Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
thong cong » trong cong, tong cong, thong thong
bang cong » dang cong, bang song, hang cong
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh trinh quan ((bang cong) OR (thong cong)) manh toan ban~.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh trinh quan ((bang cong) or (thong cong)) manh toan ban*.