Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chiet tach, chieu sang, hieu cach
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 tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai 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: ho ((chieu xanh) or (((chieu sach) or (chinh sach)))) - hanh tran van dung cong tap toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu xanh) OR (((chieu sach) OR (chinh sach)))) - hanh tran van dung cong tap toan cau.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu xanh) or (((chieu sach) or (chinh sach)))) - hanh tran van dung cong tap toan cau*.