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
quan thong » quang thong, quan trong, xuan thong
thong cong » trong cong, tong cong, thong thong
tac toan » tap toan, hach toan, tich toan
tam toan » tap toan, tam than, pham 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 trinh quan thong cong ((tac toan) or (tam toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh trinh quan thong cong ((tac toan) OR (tam toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh trinh quan thong cong ((tac toan) or (tam toan)) cau*.