Perhaps you should try some spelling variations:
thanh trung » thanh tung
thuong cong » thong cong, thuong con, thuong dong
hanh trang » canh tranh, hanh trinh, minh trang
hoc hieu » hoc thieu, hoc hien, hoc dieu
doc hieu » toc thieu, hoc thieu, hoc hien
cong san » cong tac
san phan » san pham, van phan, sat phan
phan tap » phan lap, han tap, pha tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc hieu) OR (doc hieu)) manh - ((hanh trang) or (thanh trung)) luat thuong cong san phan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hieu) OR (doc hieu)) manh - ((hanh trang) OR (thanh trung)) luat thuong cong san phan tap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc hieu) OR (doc hieu)) manh - ((hanh trang) or (thanh trung)) luat thuong cong san phan tap*".