Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chau tinh » cuu tinh, ha tinh, cua tinh
doanh cua » doanh luan
dang cong » dung cong
manh cua » ban cua
cong tac » cong ty
tac chon » tac chong, tap chon, tac cho
chon cau » chon cac, chon chu, thong cau

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