Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
chieu sang » chieu sach, chieu xanh, nhieu tang
hanh trinh » canh tranh, hanh chinh
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
hieu lang » hieu quang, nhieu tang, hieu van
cong vinh » cong trinh, trong vinh, cong viec
vinh toan » tinh toan, hinh toan, minh toan
toan cau » 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 ((chieu sang) OR (hieu lang)) - ((hanh trang) or (hanh trinh)) quan nhung cong vinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (hieu lang)) - ((hanh trang) OR (hanh trinh)) quan nhung cong vinh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sang) OR (hieu lang)) - ((hanh trang) or (hanh trinh)) quan nhung cong vinh toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) OR (hieu lang)) - ((hanh trang) or (hanh trinh)) quan nhung cong vinh toan cau*.