Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong dong, truong cong
thuong con » thuong dong, truong cong, thong cong
hoc thieu » toc thieu, hoc hien
dong luat » dong luan, dung luat, dong luc
doc hieu » toc thieu, hoc hien
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu

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 (hoc thieu)) xanh - hoat dong luat ((thuong cong) OR (thuong con)) van tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (hoc thieu)) xanh - hoat dong luat ((thuong cong) OR (thuong con)) van tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((doc hieu) or (hoc thieu)) xanh - hoat dong luat ((thuong cong) OR (thuong con)) van tuan cau".
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (hoc thieu)) xanh - hoat dong luat ((thuong cong) OR (thuong con)) van tuan cau*.