Perhaps you should try some spelling variations:
hien nganh » vien nganh, hien nhanh, hieu nganh
hanh trinh » canh tranh, hanh chinh
luat chung » luan chung, luat thuong, cua chung
luat hang » luat hanh, luat huong, luat thanh
cong tinh » cong trinh, cong vinh, long tinh
toan tap » toan ban
toan cao » 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: hoc hien nganh - hanh trinh ((luat hang) OR (luat chung)) cong tinh ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien nganh - hanh trinh ((luat hang) OR (luat chung)) cong tinh ((toan tap) OR (toan cao))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien nganh - hanh trinh ((luat hang) OR (luat chung)) cong tinh ((toan tap) or (toan cao))*".