Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thong cong » trong cong, tong cong, thong thong
khoan cam » khoa cam, khoan va, thuan cam
ho chieu » theo chieu, hoc thieu, doi chieu
cong ban » cong bang, cong san, cong tan
phan cam » phan cac, phan cau, phan cang
tung va » trung va, tuong va, vung va

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