Perhaps you should try some spelling variations:
hien hanh » dieu hanh
hanh tang » hanh trang, hanh mang, hanh tung
anh tang » anh bang, anh dang, anh nang
cua dung » cua dang, cua dong, qua dung
cong van » cong vang, song van, cong tan
cong san » cong tac
tan cau » toan cau, van cau, tan ca

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 tang) or (anh tang)) cua dung ((cong van) OR (cong san)) tan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((hanh tang) OR (anh tang)) cua dung ((cong van) OR (cong san)) tan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien hanh - ((hanh tang) or (anh tang)) cua dung ((cong van) OR (cong san)) tan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((hanh tang) or (anh tang)) cua dung ((cong van) OR (cong san)) tan cau*.