Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong cao » truong dai
dang trong » dung trong, dong trong, lang trong
doi chieu » doc hieu, doi chi, ho chieu
trung cao » trung cap, trung co, trung ca
trong tan » trong quan, trong cac, trong ca
tan phan » toan phan, than phan, van phan
phan cau » phan dau, phan cac, phan tu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - manh ((trung cao) OR (truong cao)) dang trong tan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - manh ((trung cao) OR (truong cao)) dang trong tan phan cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - manh ((trung cao) OR (truong cao)) dang trong tan phan cau*.