Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hanh hang » thanh hang, hang hang, hanh han
thi kieu » thi kiem, thi dieu, thi kim
cong dan » cong san, cong tan, huong dan
toan tai » doanh tai, toan ban, toan cao
toan tap » toan ban
co lieu » cot lieu, co hieu, so lieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thi kieu) or (co lieu)) tinh - hanh hang va thuong cong dan ((toan tai) or (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thi kieu) OR (co lieu)) tinh - hanh hang va thuong cong dan ((toan tai) OR (toan tap)).
• Adding a wildcard symbol may retrieve word variants: ((thi kieu) or (co lieu)) tinh - hanh hang va thuong cong dan ((toan tai) or (toan tap))*.