Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
lang duong » lang dong, lang muong, lang tuong
trinh vat » trinh van, trinh luat, sinh vat
duong van » duong va, luong va, dang 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 duong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (dieu hanh)) - hanh trinh vat lang duong van toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (dieu hanh)) - hanh trinh vat lang duong van toan cao*.