Perhaps you should try some spelling variations:
luat truong » luat thuong, luat trong, xuat truong
truong cong » trong cong, truong dong, truong long
hanh trinh » canh tranh, hanh chinh
vang toan » dang toan, quang toan, vang trang
hoc dieu » hoc thieu, hoc hien
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 dieu hanh - hanh trinh luat truong cong ((vang toan) OR (van toan)) tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc dieu hanh - hanh trinh luat truong cong ((vang toan) OR (van toan)) tap".
• Adding a wildcard symbol may retrieve word variants: hoc dieu hanh - hanh trinh luat truong cong ((vang toan) OR (van toan)) tap*.