Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
mang huong » manh huong, hang thuong, bang phuong
hien hanh » dieu hanh
trinh vat » trinh van, trinh luat, sinh vat
vat mang » va mang, sat mang, vat ran
dan than » dan chan, ban than, van than
than cao » toan cao, thai cao, than cap

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 hanh - hanh trinh vat mang huong dan than cao~.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh trinh vat mang huong dan than cao*.