Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh, hanh chinh
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
hoc hieu » hoc thieu, hoc hien, doc hieu
cua dung » cua dang, cua dong, qua dung
ban toan » bai toan, bao toan, dan toan
ban than » ban thanh, van thanh, ban hang
van toan » van tuan, van tan, van thanh

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 - hanh trinh cua dung cong ((((ban toan) or (ban than))) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu nganh - hanh trinh cua dung cong ((((ban toan) OR (ban than))) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu nganh - hanh trinh cua dung cong ((((ban toan) or (ban than))) or (van toan)) cau*.