Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lang huong » lan huong, lang muong, lang tuong
trinh vat » trinh van, trinh luat, sinh vat
huong van » huong dan, duong van, hong van
vat lang » va lang, van lang, vat mang
van toan » van tuan, van tan, van thanh
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 hanh) OR (dieu hanh)) - hanh trinh vat lang huong van toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien hanh) OR (dieu hanh)) - hanh trinh vat lang huong van toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) OR (dieu hanh)) - hanh trinh vat lang huong van toan cao*.