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
tran chau » tranh chap, tran huu
thong va » thong cua, truong va, thong qua
cong tan » cong tac, cong san, cong thanh
tang va » trang va, tang van, thang va

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 ((tang va) or (thong va)) thong cong tan tran chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((tang va) OR (thong va)) thong cong tan tran chau*.