Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
canh trinh » canh tranh, hanh trinh, canh tinh
thong cong » trong cong, tong cong, thong thong
nhung don » nhung van, nhung bo
trinh ve » trinh he, trinh va, trinh vi
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu nganh - canh trinh ve ((nhung don) or (thong cong)) bai ((toan cau) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu nganh - canh trinh ve ((nhung don) OR (thong cong)) bai ((toan cau) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: ho hieu nganh - canh trinh ve ((nhung don) or (thong cong)) bai ((toan cau) or (van ban))*.