Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
ho chieu » theo chieu, hoc thieu, doi chieu
tranh va » tranh van, trang va, thanh va
trinh va » trinh van, trinh vat, trinh ve
cong san » cong tac
toan tap » toan ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - hanh ((tranh va) OR (trinh va)) thong cong san ((toan tap) OR (van ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - hanh ((tranh va) OR (trinh va)) thong cong san ((toan tap) or (van ban))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - hanh ((tranh va) OR (trinh va)) thong cong san ((toan tap) or (van ban))*.