Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hieu manh, nghiep nganh
canh trinh » canh tranh, hanh trinh, canh tinh
hiem ngan » viem gan
trinh xay » trinh ky
trong van » trong cac
van phong » van dong, hai phong
phong cau » thong cau, phong cac, phong cai
kim ngan » kim ngoc

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 nganh) or (((hiem ngan) OR (kim ngan)))) - canh trinh xay dung trong van phong cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (((hiem ngan) OR (kim ngan)))) - canh trinh xay dung trong van phong cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (((hiem ngan) OR (kim ngan)))) - canh trinh xay dung trong van phong cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (((hiem ngan) OR (kim ngan)))) - canh trinh xay dung trong van phong cau*.