Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh cua » trinh luat, trinh quan, trinh luan
dang cong » dung cong
cong cong » cong dong, trong cong, dung cong
ho chieu » theo chieu, hoc thieu, doi chieu
tinh cua » sinh cua, tinh chat, tranh cua
thang ca » thang cua, tang ca, thang va
hang ca » hang va, nang cao, hang tai

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 - hanh ((trinh cua) OR (tinh cua)) dang cong cong ((thang ca) or (hang ca))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((trinh cua) OR (tinh cua)) dang cong cong ((thang ca) OR (hang ca)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((trinh cua) OR (tinh cua)) dang cong cong ((thang ca) or (hang ca))".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((trinh cua) OR (tinh cua)) dang cong cong ((thang ca) or (hang ca))*.