Perhaps you should try some spelling variations:
luat trong » suat trong, thuat trong, luat thuong
hanh mang » nhanh mang, hanh trang, nhanh lang
mang luat » tang luat, nang suat, tang luan
doc hieu » hoc thieu, hoc hien
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan cao » toan ban, toan tap

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) or (toc thieu)) manh - hanh mang luat trong ((cong dan) OR (cong san)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (toc thieu)) manh - hanh mang luat trong ((cong dan) OR (cong san)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (toc thieu)) manh - hanh mang luat trong ((cong dan) OR (cong san)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (toc thieu)) manh - hanh mang luat trong ((cong dan) OR (cong san)) toan cao*.