Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu nganh » vien nganh, hieu manh, nghiep nganh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hiem ngan » kim ngan, viem gan
trang va » tran van, hang va
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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)) - hanh trang va ((nhung cong) OR (thong cong)) dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (hiem ngan)) - hanh trang va ((nhung cong) OR (thong cong)) dan toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hieu nganh) or (hiem ngan)) - hanh trang va ((nhung cong) OR (thong cong)) dan toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (hiem ngan)) - hanh trang va ((nhung cong) OR (thong cong)) dan toan cau*.