Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
toc hieu » toc thieu, doc hieu, hoc thieu
mang cua » manh cua, dung cua, ban cua
van phan » van phong, van thanh, luan phan
sat phan » sat nhan, vat phan, xuat phan

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc hieu nganh - cach mang cua thong cong ((van phan) or (sat phan)) lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc hieu nganh - cach mang cua thong cong ((van phan) OR (sat phan)) lap.
• Adding a wildcard symbol may retrieve word variants: toc hieu nganh - cach mang cua thong cong ((van phan) or (sat phan)) lap*.