Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lang huong » lan huong, lang muong, lang tuong
hien hanh » dieu hanh
trinh vat » trinh van, trinh luat, sinh vat
vat lang » va lang, van lang, vat mang
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 lang huong dan than cao~.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - hanh trinh vat lang huong dan than cao*.