Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
hanh mang » nhanh mang, hanh trang, nhanh lang
cua nhung » va nhung
mang cua » manh cua, dung cua, ban cua
cong van » cong vang, song van, cong tan
cong san » cong tac
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: hoc hien nhanh - hanh mang cua nhung ((cong van) or (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - hanh mang cua nhung ((cong van) OR (cong san)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - hanh mang cua nhung ((cong van) or (cong san)) toan cao*.