Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, nghiep nganh
nhung cong » dung cong, thong cong, hang cong
hieu manh » chieu xanh, dieu hanh, hieu van
hien hanh » dieu hanh
hanh tang » hanh trang, anh tang, hanh mang
cong van » cong vang, cong san, song van
van quan » van ban
quan tap » quan tai, quan lap, quan tam
tang va » trang va, tang van, thang va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((((hieu manh) OR (hien hanh))) or (hieu nganh)) - hanh tang va nhung cong van quan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((hieu manh) OR (hien hanh))) OR (hieu nganh)) - hanh tang va nhung cong van quan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((hieu manh) OR (hien hanh))) or (hieu nganh)) - hanh tang va nhung cong van quan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((((hieu manh) OR (hien hanh))) or (hieu nganh)) - hanh tang va nhung cong van quan tap*.