Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
hien anh » hien hanh, thien anh, dien anh
ky duong » ke duong, huy duong, ky thuong
huy dong » ha dong
toan ban » van ban

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 anh - canh trinh ((ky duong) or (huy dong)) cong manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien anh - canh trinh ((ky duong) OR (huy dong)) cong manh toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc hien anh - canh trinh ((ky duong) or (huy dong)) cong manh toan ban*.