Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
van chuong » van duong, van hung, van cong
hieu lang » chieu sang, hieu quang, nhieu tang
van phong » van dong, hai phong
dung manh » duong manh, dung danh, hung manh
manh toan » thanh toan, anh tuan, tinh 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 ((hieu lang) or (chieu sach)) - canh tranh ((van chuong) OR (van phong)) dung manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu lang) OR (chieu sach)) - canh tranh ((van chuong) OR (van phong)) dung manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu lang) or (chieu sach)) - canh tranh ((van chuong) OR (van phong)) dung manh toan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu lang) or (chieu sach)) - canh tranh ((van chuong) OR (van phong)) dung manh toan cau*.