Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
hanh trang » thanh trung, hanh trinh, minh trang
hieu lang » chieu sang, hieu quang, nhieu tang
cua khong » hua khong, cua phuong, cua thuong
doi hieu » doi chieu, doc hieu, doi hien
cong dan » cong san, cong tan, huong dan
toan tai » toan tap, doanh tai, toan ban
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: doi hieu lang - ((hanh trang) or (canh tranh)) cua khong cong dan ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((hanh trang) OR (canh tranh)) cua khong cong dan ((toan tai) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - ((hanh trang) or (canh tranh)) cua khong cong dan ((toan tai) or (toan cao))*.