Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
tang luan » dung luan
chu xanh » chu manh, chieu xanh, chua xang
tang cua » mang cua, hang cua, thong cua
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: theo ((chu xanh) OR (chieu sach)) - hanh ((tang cua) OR (tang luan)) thong cong tan toan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chieu sach)) - hanh ((tang cua) OR (tang luan)) thong cong tan toan cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chieu sach)) - hanh ((tang cua) OR (tang luan)) thong cong tan toan cau*.