Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung van » truong van, trung va, trung tuan
trong van » trong cac
trong san » trong cac, dong san, trong ca
ho chieu » theo chieu, hoc thieu, doi chieu
cong san » cong tac
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 sach - thanh ((trung van) or (trong van)) dung ((trong san) OR (cong san)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung van) OR (trong van)) dung ((trong san) OR (cong san)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trung van) or (trong van)) dung ((trong san) OR (cong san)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung van) or (trong van)) dung ((trong san) OR (cong san)) toan cau*.