Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh, hanh chinh
thong cong » trong cong, tong cong, thong thong
hanh tinh » nhanh tinh, thanh tinh, canh tinh
doc hieu » toc thieu, hoc thieu, hoc hien
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan tap » toan ban

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 nganh - ((hanh tinh) OR (hanh trinh)) he thong cong dan toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu nganh - ((hanh tinh) OR (hanh trinh)) he thong cong dan toan tap".
• Adding a wildcard symbol may retrieve word variants: doc hieu nganh - ((hanh tinh) OR (hanh trinh)) he thong cong dan toan tap*.