Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thanh tung » thanh cong
hien hanh » dieu hanh
san thuat » san xuat, va thuat, van thuan
thuat cao » thuat co, thuat bao, thuat cam
va duong » van duong, va huong, va dong
va tuong » va thuong, va thong, xa truong
cong san » cong tac

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) or (thanh tung)) ((va duong) OR (va tuong)) cong san thuat cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((hanh trinh) OR (thanh tung)) ((va duong) OR (va tuong)) cong san thuat cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - ((hanh trinh) or (thanh tung)) ((va duong) OR (va tuong)) cong san thuat cao".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((hanh trinh) or (thanh tung)) ((va duong) OR (va tuong)) cong san thuat cao*.