Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
cua thuong » cua truong, cua phuong, ca thuong
hanh trang » thanh trung, canh tranh, hanh trinh
lieu quan » lien quan, lieu van
hanh mang » nhanh mang, nhanh lang, thanh hang
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan dau » phan tu, hang dau

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

• Performing a fuzzy search may retrieve terms with similar spellings: so ((lieu quan) OR (hieu qua)) - ((hanh mang) or (hanh trang)) cua thuong cong dan phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so ((lieu quan) OR (hieu qua)) - ((hanh mang) OR (hanh trang)) cua thuong cong dan phan dau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((lieu quan) OR (hieu qua)) - ((hanh mang) or (hanh trang)) cua thuong cong dan phan dau*".