Perhaps you should try some spelling variations:
hieu quang » thieu quang, hieu quan, hieu qua
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu lang » chieu sang, nhieu tang, hieu van
hanh tran » hanh trang, thanh tran, hanh tram
dung cong » dung trong
tran van » luan van
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cau » toan cao, toan ban, toan tap

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((((hieu lang) OR (hieu quang))) OR (chieu xanh)) - hanh tran van dung cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((((hieu lang) OR (hieu quang))) or (chieu xanh)) - hanh tran van dung cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((((hieu lang) OR (hieu quang))) or (chieu xanh)) - hanh tran van dung cong tan toan cau*.