Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
thong cong » trong cong, tong cong, thong thong
tang luan » dung luan
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tang cua » mang cua, hang cua, thong cua
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: theo ((chieu sach) or (chiet tach)) - hanh ((tang cua) OR (tang luan)) thong cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - hanh ((tang cua) OR (tang luan)) thong cong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chiet tach)) - hanh ((tang cua) OR (tang luan)) thong cong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - hanh ((tang cua) OR (tang luan)) thong cong manh toan cau*.