Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hinh trong » chinh trong, dinh trong, binh trong
sinh trong » sinh truong, sinh trung, dinh trong
doi chieu » doc hieu, doi chi, mot chieu
lang cong » bang cong, hang cong, lang dong
dang cong » dung cong
sang than » cang thang, dang thanh, sang tao
than cau » toan cau, phan cau, than cap

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 - ((hinh trong) OR (sinh trong)) va ((lang cong) or (dang cong)) sang than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((hinh trong) OR (sinh trong)) va ((lang cong) OR (dang cong)) sang than cau*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((hinh trong) OR (sinh trong)) va ((lang cong) or (dang cong)) sang than cau*".