Perhaps you should try some spelling variations:
chieu xanh » chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, hieu cach
chieu sang » hieu lang, nhieu tang
thong cong » trong cong, tong cong, thong thong
hanh tran » hanh trang, thanh tran, hanh tram
van thong » van thuong, van phong, va thong
tran van » luan van
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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 xanh) OR (chieu sach))) or (chieu sang)) - hanh tran van thong cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu xanh) OR (chieu sach))) OR (chieu sang)) - hanh tran van thong cong dan van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((chieu xanh) OR (chieu sach))) or (chieu sang)) - hanh tran van thong cong dan van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu xanh) OR (chieu sach))) or (chieu sang)) - hanh tran van thong cong dan van ban*.