Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
chieu sang » chieu sach, chieu xanh, hieu lang
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hieu sang » hieu lang, hieu quang, nhieu tang
cua nhung » va nhung
cong san » cong tac
san than » sang than, san thanh, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu sang) OR (chieu sang)) - ((hanh trang) or (hanh trinh)) cua nhung cong san than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu sang) OR (chieu sang)) - ((hanh trang) OR (hanh trinh)) cua nhung cong san than cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu sang) OR (chieu sang)) - ((hanh trang) or (hanh trinh)) cua nhung cong san than cao*".