Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
hien hach » thien hach, hien hanh, hien nhanh
trinh cao » trinh chao, trinh co, trinh cau
cao dung » cao dang, cao dong, cao ung
cong dan » cong tan, huong dan, cong dong
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 hach - hanh trinh cao dung ((cong dan) OR (cong san)) toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hach - hanh trinh cao dung ((cong dan) OR (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien hach - hanh trinh cao dung ((cong dan) OR (cong san)) toan cao*.