Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
dang cong » dung cong
cong manh » cong danh, duong manh, cong thanh
hien anh » hien hanh, thien anh, dien anh
trinh va » trinh van, trinh vat, trinh ve
toan cao » toan tap
toan ban » van ban
va dang » van dang, va nang, va lang

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