Perhaps you should try some spelling variations:
thuong cong » thong cong, thuong con, thuong dong
hieu nganh » hiem ngan, hieu manh, nghiep nganh
vien nganh » vien thanh
hanh trang » thanh trung, canh tranh, hanh trinh
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
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: hoc ((hieu nganh) or (vien nganh)) - hanh trang va thuong cong dan ((toan cao) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu nganh) OR (vien nganh)) - hanh trang va thuong cong dan ((toan cao) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu nganh) or (vien nganh)) - hanh trang va thuong cong dan ((toan cao) or (van ban))*.