Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thong cong » trong cong, tong cong, thong thong
hieu xanh » chieu xanh, hieu manh, dieu hanh
hanh tran » hanh trang, thanh tran, hanh tram
van thong » van thuong, van phong, va thong
san chang » ban hang, dan chan, van khang
tran van » luan van
san hang » ban hang, van hang, san sang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu xanh) or (hieu nganh)) - hanh tran van thong cong ((san hang) OR (san chang)) dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu nganh)) - hanh tran van thong cong ((san hang) OR (san chang)) dau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (hieu nganh)) - hanh tran van thong cong ((san hang) OR (san chang)) dau".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu nganh)) - hanh tran van thong cong ((san hang) OR (san chang)) dau*.