Perhaps you should try some spelling variations:
nhieu tang » chieu sang, hieu lang, nhiet nang
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh trang » thanh trung, canh tranh, hanh trinh
quang dung » quang trung, ung dung, cuong dung
hanh tran » thanh tran, hanh tram, thanh trang
dung cong » dung trong
cong tan » cong tac, cong san, cong thanh
tran cau » tran chau, toan cau, ran cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((nhieu tang) or (chieu xanh)) - ((hanh tran) OR (hanh trang)) quang dung cong tan tran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (chieu xanh)) - ((hanh tran) OR (hanh trang)) quang dung cong tan tran cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhieu tang) or (chieu xanh)) - ((hanh tran) OR (hanh trang)) quang dung cong tan tran cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (chieu xanh)) - ((hanh tran) OR (hanh trang)) quang dung cong tan tran cau*.