Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
doi chieu » doc hieu, doi chi, ho chieu
trinh van » trinh han, trinh quan, trinh toan
cong can » cong san, cong tan, cong dan
tinh va » tich va, trinh vat, tinh gia
can ban » van ban, toan ban
ban cau » bang cau, ban can, van cau

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 - hanh ((tinh va) OR (trinh van)) thong cong can ban cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((tinh va) OR (trinh van)) thong cong can ban cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((tinh va) OR (trinh van)) thong cong can ban cau*.