Perhaps you should try some spelling variations:
hien nhanh » hien hanh, thien thanh, tien thanh
nhung cong » dung cong, thong cong, hang cong
canh manh » lanh manh, canh tranh, cach mang
cua nhung » va nhung
manh cua » doanh cua, ban cua
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

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 - canh manh cua nhung cong ((van toan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nhanh - canh manh cua nhung cong ((van toan) OR (van tan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien nhanh - canh manh cua nhung cong ((van toan) or (van tan)) cau*.