Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
thanh tung » thanh cong
duong cong » dung cong, luong cong, duong trong
hien hanh » dieu hanh
thuat cao » thuat co, thuat bao, thuat tao
thuat cam » thuat dam, thuat chan, thuat xay
va duong » van duong, va tuong, va huong
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 cong san ((thuat cao) OR (thuat cam))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((hanh trinh) OR (thanh tung)) va duong cong san ((thuat cao) OR (thuat cam)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - ((hanh trinh) or (thanh tung)) va duong cong san ((thuat cao) OR (thuat cam))".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((hanh trinh) or (thanh tung)) va duong cong san ((thuat cao) OR (thuat cam))*.